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workshopmanual
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004-
05
V750 IE
Cod.
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USA
Cod.
32 9
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INTRODUCTION
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INTRODUCTION 0
INTRODUCTION
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SUMMARY0.1. INTRODUCTION .............................................................................................................................................. 3
0.1.1. INTRODUCTION ....................................................................................................................................... 30.1.2. REFERENCE MANUALS .......................................................................................................................... 40.1.3. ABBREVIATIONS/SYMBOLS/CONVENTIONS ........................................................................................ 5
INTRODUCTION
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0.1. INTRODUCTION0.1.1. INTRODUCTION
- This manual provides the information required for normal servicing.- This publication is intended for use by Moto Guzzi dealerships and their qualified mechanics; many concepts have
been omitted inasmuch as their inclusion would be superfluous for such an audience. Since complete mechanicalexplanations have not been included in this manual, the reader must be familiar with basic notions of mechanics, aswell as with basic repair procedures. Without such familiarity, repairs and checks could be ineffective and evenhazardous. Since the repair and vehicle check instructions are not exhaustive, special care must be taken to avoiddamage and injury. To ensure maximum customer satisfaction with the vehicle, Moto Guzzi spa continuouslyimproves its products and their documentation. The main technical modifications and changes in repair proceduresare communicated to all Moto Guzzi dealerships and agencies worldwide. Such modifications will be entered insubsequent editions of the manual. In case of doubt regarding specific repairs or checks, contact the Moto GuzziSERVICE DEPARTMENT; we will be pleased to provide all necessary information and assistance as well askeeping you updated on changes and modifications to the vehicle.
Moto Guzzi s.p.a. reserves the right to make changes to its products at any time, barring any such changes as may alterthe essential features of a product as specified in the relevant manual.All rights of storage using electronic means, reproduction and total or partial adaptation, whatever the means adopted,are reserved in all countries.The mention of third parties products is only made for information purposes, and constitutes no engagement.Moto Guzzi spa is not liable in any way for the performance or use of its products.
For more details see (REFERENCE MANUALS)
First edition: May 2004
Designed and printed by:
DECA s.r.l.via Risorgimento, 23/1 - 48022 Lugo (RA) - ItalyTel. +39 - 0545 35235Fax +39 - 0545 32844E-mail: [email protected]
On behalf of:
Moto Guzzi s.p.a.via E.V. Parodi, 57- 23826 Mandello del Lario (Lecco) - ItalyTel. +39 (0)341 - 709111Fax +39 (0)341 - 709220www.motoguzzi.itwww.servicemotoguzzi.com
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0.1.2. REFERENCE MANUALS
PARTS CATALOGUESguzzi part# (description)GU07500
OWNERS MANUALSguzzi part# (description)32.90.00.6032.90.00.6132.90.00.62
CYCLE PARTS TECHNICAL MANUALguzzi part# (description)32.92.01.6032.92.01.6132.92.01.6232.92.01.6332.92.01.6432.92.01.65
ENGINE TECHNICAL MANUALguzzi part# (description)32.92.02.1032.92.02.1132.92.02.1232.92.02.1332.92.02.1432.92.02.15
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0.1.3. ABBREVIATIONS/SYMBOLS/CONVENTIONS
# = number< = less than> = greater than≤ = less than or equal to≥ = more than or equal to~ = approximately∞ = infinity°C = degrees Celsius (centigrade)°F = degrees Fahrenheit± = plus or minusAC = alternating currentA = AmpereAh = Ampere per hourAPI = American Petroleum InstituteHV = high voltageAV/DC = Anti-Vibration Double Countershaftbar = pressure measurement (1 bar =100 kPa)DC. = Direct Currentcc = cubic centimetresCO = carbon monoxideCPU = Central Processing UnitDIN = German industrial standards (Deutsche Industrie Norm)DOHC = Double Overhead CamshaftECU = Electronic Control Unitrpm = revolutions per minuteHC = unburnt hydrocarbonsISC = Idle Speed ControlISO = International Standardization OrganizationKg = kilogramsKgm = kilogram metre (1 kgm =10 Nm)km = kilometreskph = kilometres per hourkΩ = kilo OhmkPa = kiloPascal (1 kPa =0.01 bar)KS = clutch side (from the German "Kupplungseite")kW = kiloWatt
l = litresLAP = racetrack lapLED = Light Emitting DiodeLEFT SIDE = left sidem/s = metres per secondmax = maximummbar = millibar (1 mbar =0.1 kPa)mi = milesMIN = minimumMPH = miles per hourMS = flywheel side (from the German "Magnetoseite")MΩ = megaOhmN.A. = Not AvailableN.O.M.M. = Motor Octane NumberN.O.R.M. = Research Octane NumberNm = Newton metre (1 Nm =0.1 kgm)
Ω = ohmPICK-UP = pick-upBDC = Bottom Dead CentreTDC = Top Dead CentrePPC = Pneumatic Power ClutchRIGHT SIDE = right sideSAE = Society of Automotive EngineersTEST = diagnostic checkT.B.E.I. = crown-head Allen screw
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T.C.E.I. = cheese-head Allen screwT.E. = hexagonal headTP = flat head screwTSI = Twin Spark IgnitionUPSIDE-DOWN = inverted forkV = VoltW = WattØ = Diameter
GENERAL INFORMATION
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GENERAL INFORMATION 1
GENERAL INFORMATION
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TABLE OF CONTENTS1.1. STRUCTURE OF THE MANUAL..................................................................................................................... 3
1.1.1. CONVENTIONS USED IN THE MANUAL ............................................................................................. 31.1.2. SAFETY WARNINGS............................................................................................................................. 4
1.2. GENERAL WARNINGS................................................................................................................................... 51.2.1. GENERAL SAFETY RULES .................................................................................................................. 5
1.3. HAZARDOUS SUBSTANCES......................................................................................................................... 81.3.1. WARNINGS ........................................................................................................................................... 8
1.4. RUNNING-IN ................................................................................................................................................. 111.4.1. RUNNING-IN........................................................................................................................................ 11
1.5. LOCATION OF SERIAL NUMBERS.............................................................................................................. 121.5.1. LOCATION OF SERIAL NUMBERS .................................................................................................... 12
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1.1. STRUCTURE OF THE MANUAL1.1.1. CONVENTIONS USED IN THE MANUAL
• This manual is divided in sections and subsections, each covering a set of the most significant components. Forquick reference, see the summary of sections.
• Unless expressly specified otherwise, assemblies are reassembled by reversing the disassembly procedure.• The terms "left" and "right" are referred to the motorcycle when viewed from the riding position.• Motorcycle operation and basic maintenance are covered in the USE AND MAINTENANCE manual.
In this manual any variants are identified with these symbols:
optionalcatalytic version
- all versionsMP national certificationSF European certification (EURO 1 limits)
VERSION:Italy Greece MalaysiaUnitedKingdom
Holland Chile
Austria Switzerland CroatiaPortugal Denmark AustraliaFinland Japan United States of AmericaBelgium Singapore BrazilGermany Slovenia Republic of South AfricaFrance Israel New ZealandSpain South Korea Canada
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1.1.2. SAFETY WARNINGS
The following precautionary warnings are used throughout this manual in order to convey the following messages:
Safety warning. This symbol appears, whether in the manual or on the vehicle itself, to indicate apersonal injury hazard. Non-compliance with the indications given in the messages preceded by thissymbol may result in grave risks for your and other people's safety and for the vehicle!
DANGERIndicates a potential hazard which may result in serious injury or even death.
WARNINGIndicates a potential hazard which may result in minor personal injury or damage to the vehicle.
IMPORTANT: The word "IMPORTANT" in this manual precedes important information or instructions.
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1.2. GENERAL WARNINGS1.2.1. GENERAL SAFETY RULES
CARBON MONOXIDEWhen an operation must be performed with the engine running, position the motorcycle outdoors or in a well-ventilatedarea.Never run the engine in an enclosed place.Use an exhaust emission extraction plant when working indoors.
DANGERExhaust emissions contain carbon monoxide, a poisonous gas that may cause loss of consciousnessor even death.
FUEL
DANGERThe fuel used for internal combustion engines is extremely inflammable and in particular conditions itcan become explosive.It is important to carry out the refueling and the maintenance operations in a well-ventilated area, withthe engine off.Do not smoke when refueling or in the proximity of sources of fuel vapors. Avoid contact with bareflames, sources of sparks or any other source which may ignite the fuel or lead to explosion.
DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.
KEEP AWAY FROM CHILDREN.
HOT COMPONENT PARTSThe engine and exhaust component parts become hot when the engine is running and will stay hot for some time afterthe engine has been stopped.Wear insulating gloves before handling these components or allow for the engine and exhaust system to cool downbefore proceeding.
EXHAUSTED GEARBOX AND FORK OIL
DANGERWear latex gloves during servicing.Prolonged or repeated contact with gearbox oil may cause severe skin damage.Wash your hands thoroughly after handling gearbox oil.Dispose of gearbox oil through the nearest waste oil reclamation firm or through the supplier.Wear latex gloves during servicing.
DO NOT DISPOSE OF OIL IN THE ENVIRONMENT
KEEP AWAY FROM CHILDREN.
BRAKE FLUID
WARNINGBrake fluid can damage painted, plastic or rubber surfaces. When servicing the brake system, protectsuch surfaces with a clean cloth.Always wear safety glasses when servicing the brake system.Brake fluid is extremely dangerous in contact with the eyes.In case of contact with the eyes, rinse abundantly with cool, clean water and immediately seekmedical attention.
KEEP AWAY FROM CHILDREN.
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HYDROGEN GAS AND BATTERY ELECTROLYTE
DANGERThe battery electrolyte is a toxic, caustic substance containing sulphuric acid and thus able to causesevere burns in case of contact.Wear close-fitting gloves and protective clothing when handling the battery electrolyte.If any battery fluid gets on your skin, rinse the affected area with abundant fresh water.Take special care to protect your eyes - even a small amount of battery fluid can cause blindness. Ifbattery fluid is spilled into your eyes, flush with abundant water for fifteen minutes and contact an eyespecialist immediately.If battery fluid is swallowed accidentally, drink abundant water or milk. Immediately seek medicalattention and keep drinking milk of magnesia or vegetable oil in the meantime.The battery gives off explosive gases. Keep the battery well away from any sources of ignition, suchas flames, sparks, or any heat sources.Make sure the area is well ventilated when servicing or refilling the battery.
KEEP AWAY FROM CHILDREN.
Battery fluid is corrosive.Avoid spillage. Take special care not to spill battery fluid on plastic parts.Ensure that the electrolyte fluid you are using is the suitable type for your battery.
GENERAL PRECAUTIONS AND INFORMATIONFollow these instructions closely when repairing, disassembling or reassembling the motorcycle or its components.
DANGERDo not use open flames when working on the vehicle. Before proceeding to maintain or inspect themotorcycle, stop the engine and remove the ignition switch key. Ensure that the engine and exhaustsystem have cooled down. Wherever possible, place the motorcycle on firm and level ground and lift itusing suitable equipment. Pay special attention to hot engine parts and the exhaust system: burnshazard.Do not hold mechanical parts or engine components in the mouth, as some of them are made of toxicmaterials.Unless otherwise specified, re-assembly takes place in the reverse order to disassembly. Where aprocedure is cross-referred to relevant sections in the manual, proceed sensibly to avoid disturbingany parts unless strictly necessary. Never use abrasive pastes to polish opaque paintwork.Never use fuel instead of solvent to clean the motorcycle.Do not use alcohol, petrol or solvents to clean the rubber and plastic parts and the saddle: use onlywater and mild soap.Always disconnect the battery negative () lead before soldering any electrical components.When two or more persons service the same motorcycle together, special care must be taken to avoidpersonal injury.For more details see (HAZARDOUS COMPONENTS)
BEFORE DISASSEMBLING ANY COMPONENTS• Clean off all dirt, mud, and dust and clear any foreign objects from the vehicle before disassembling any
components.• Use the model-specific special tools where specified.
DISASSEMBLING THE COMPONENTS- Never use pliers or similar tools to slacken and/or tighten nuts and bolts. Always use a suitable spanner.- Mark all connections (hoses, wiring, etc.) with their positions before disconnecting them. Identify each connection
using a distinctive symbol or convention.- Mark each part clearly to avoid confusion when refitting.- Thoroughly clean and wash any components you have removed using a detergent with low flash point.- Mated parts should always be kept together. These parts will have seated themselves against one another in service
as a result of normal wear and tear.- Certain components are matched-pair parts and should always be used together or replaced as a set.- Keep the motorcycle and its components well away from heat sources.
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REASSEMBLING THE COMPONENTS
DANGERNever reuse circlips or snap rings. These parts must always be renewed once they have beendisassembled.When fitting a new circlip or snap ring, open the ends just sufficiently to allow fitment to the shaft.Make a rule to check that a newly-fitted circlip or snap ring has located fully into its groove.Never use compressed air to clean bearings.
IMPORTANT: All bearings must run freely with no hardness or noise. Replace any bearings that do not meet theserequirements.
- Use ORIGINAL Moto Guzzi SPARE PARTS only.- Use the specified lubricants and consumables.- Where possible, lubricate a part before assembly.- When tightening nuts and bolts, start with the largest or innermost nut/bolt and observe a cross pattern. Tighten
evenly in subsequent steps until achieving the specified torque.- Replace any self-locking nuts, gaskets, seals, circlips or snap rings, O-rings, split pins, bolts and screws which have
a damaged thread.- Lubricate bearings abundantly before assembly.- Make a rule to check that all components you have fitted are correctly in place.- After repairing the motorcycle and after each service inspection, perform the preliminary checks, and then operate
the motorcycle in a private estate area or in a safe area away from traffic.- Clean all mating surfaces, oil seal edges and gaskets before assembly. Apply a light coat of lithium grease along the
edges of oil seals. Fit oil seals and bearings with the brand or serial number facing outwards (in view).
ELECTRICAL CONNECTORSDisconnect electrical connectors as follows: failure to follow the instructions can seriously damage the connectors andthe wiring:Press down on the locking tab, where fitted.
WARNINGNever separate two connectors by pulling on the wiring.
• Grasp both connectors and pull them in opposite directions until they become separated.• Remove any dirt, rust, moisture, etc. from inside the connector with compressed air.• Ensure that the wires are securely crimped to the terminals inside each connector.
IMPORTANT: A connector will only locate properly into the matching connector when it is inserted in the correctmounting position.
• Reconnect the two connectors and ensure that they are fully engaged (if fitted with a locking tab, it should clickaudibly into place).
TIGHTENING TORQUES
DANGERDo not forget that the tightening torques of all fastenings on wheels, brakes, wheel spindles and othersuspension components are essential to ensuring safe operation of the motorcycle and must be set tothe indicated values.Regularly check the tightening torques on all fastenings, and always use a torque wrench when fittingthem. Failure to observe these instructions can result in parts loosening or coming away, thusjamming a wheel or creating other problems which could affect the handling of the motorcycle,potentially resulting in serious injury or death.
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1.3. HAZARDOUS SUBSTANCES1.3.1. WARNINGS
FUEL
DANGERThe fuel used for internal combustion engines is extremely inflammable and in particular conditions itcan become explosive.It is important to carry out the refueling and the maintenance operations in a well-ventilated area, withthe engine off.Do not smoke when refueling or in the proximity of sources of fuel vapors. Avoid contact with bareflames, sources of sparks or any other source which may ignite the fuel or lead to explosion.Take care not to spill fuel out of the filler, or it may ignite when in contact with hot engine parts.In the event of accidental fuel spillage, make sure the affected area is fully dry before starting theengine. Fuel expands from heat and when left under direct sunlight.Never fill the tank to the brim. Tighten the filler cap securely after each refueling.Avoid any contact of the fuel with the skin and the inhalation of vapors; do not swallow fuel or pour itfrom a receptacle into another by means of a tube.DO NOT DISPOSE OF FUEL IN THE ENVIRONMENT.KEEP AWAY FROM CHILDREN.
Use only premium-grade unleaded fuel with a minimum octane rating of 95 (N.O.R.M.) and 85 (N.O.M.M.).
LUBRICANTS
DANGERCorrect lubrication is essential to the safety of the motorcycle.Failure to maintain the lubricant level or the use of incorrect, old or dirty lubricant can cause theengine or transmission to seize, resulting in accidents, serious injury or death.Prolonged or repeated contact with engine oil may cause severe skin damage.Wash your hands thoroughly after handling engine oil.Do not dispose of oil in the environment.Dispose of engine oil through the nearest waste oil reclamation firm or through the supplier.
WARNINGWhen filling the vehicle with lubricant, make sure not to spill it. Immediately clean up spilled oil, as itcan damage the motorcycle's paint.Oil on the tires can make them very slippery and dangerous to use.In case of oil leaks, do not use the vehicle. Identify the cause of the leak and repair it.
ENGINE OIL
DANGERProlonged or repeated contact with engine oil may cause severe skin damage.Wash your hands thoroughly after handling engine oil.Do not dispose of oil in the environment.Dispose of engine oil through the nearest waste oil reclamation firm or through the supplier.Wear latex gloves during servicing.
FRONT FORK FLUID
DANGERModifying the suspension settings or the viscosity of the front fork oil will affect its response.Standard oil viscosity: SAE 20 W. Choose the oil viscosity to determine the type of response required(SAE 5W for a softer suspension, 20W for a stiffer suspension).The two grades can also be mixed in varying solutions to obtain the desired response.
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BRAKE FLUID
IMPORTANT This motorcycle is fitted with two (front and rear) disk brakes with independent hydraulic circuits. Theinformation provided below applies to both braking systems.
DANGERDo not use the vehicle if the brakes are worn or malfunctioning! The brakes are the most importantsafety component on the vehicle, and using the vehicle with the brakes in less than perfect conditionis very likely to result in an accident, with the risk of serious personal injury or death.The brakes are significantly less effective on a wet road surface.
DANGERIf the road surface is wet with rain, maintain a double braking distance, inasmuch as both the brakesthemselves and the grip of the tires are significantly less effective in such conditions.Water on the brakes, whether due to a recent wash or picked up from the wet road surface, puddles ordrains, can result in significantly reduced brake effectiveness.Failure to observe these instructions can result in serious accidents, with the risk of serious personalinjury or death.The brakes are essential to your safety. Do not use the vehicle if the brakes are not in perfect workingorder.Always check the brakes before riding the motorcycle.Brake fluid is an irritant. Avoid contact with eyes or skin.In the event of accidental contact, wash affected body parts thoroughly. In the event of accidentalcontact with eyes, contact an eye specialist or seek medical advice.DO NOT DISPOSE OF THE FLUID IN THE ENVIRONMENT.KEEP AWAY FROM CHILDREN.When handling brake fluid, take care not to spill it onto plastic or paint-finished parts or they willdamage.
DANGERDo not use any brake fluids other than the specified type. Never mix different types of fluids to top uplevel, as this will damage the braking system.Do not use brake fluid from containers which have been kept open or in storage for long periods.Sudden resistance or clearance problems on the brake levers may be due to troubles in the hydrauliccircuits.Ensure that the brake discs and friction material have not become contaminated with oil or grease.This is particularly important after servicing or inspections.Make sure the brake lines are not twisted or worn.Avoid accidental ingress of water or dust into the circuit.Wear latex gloves when servicing the hydraulic circuit.
DISK BRAKES
DANGERThe brakes are the vehicles most important safety component.To ensure your personal safety, they must be in perfect working order and should be checked beforeevery ride.Oil or other liquids on the disks will contaminate the brake pads.Dirty pads must be replaced. A dirty or oily disk should be cleaned with a high quality degreaser.If the vehicle is often used on wet road surfaces or on dusty or rough tracks, or in case of use incompetition, reduce the service intervals by half.Check the wear of the brake pads.When the pads are worn, the fluid level in the tank lowers to compensate for the wear.The front brake fluid reservoir is on the RH side of the handlebar, next to the front brake lever.The rear brake fluid reservoir is under the RH side fairing.Do not use the vehicle if the brake system is leaking in any position.
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COOLANT
DANGERCoolant is toxic when ingested and is an irritant, contact with eyes or skin may cause irritation.On the event of contact with the skin or the eyes, rinse repeatedly with abundant water and seekmedical advice. If swallowed, provoke vomiting, rinse the mouth and throat with abundant water andimmediately seek medical attention.DO NOT DISPOSE OF THE FLUID IN THE ENVIRONMENT.KEEP AWAY FROM CHILDREN.
DANGERTake care not to spill coolant onto hot engine parts. It may ignite and produce invisible flames. Wearlatex gloves when working on the system.Do not ride when coolant is below the minimum level.
Coolant mixture is a 50% solution of water and anti-freeze. This is the ideal solution for most operating temperatures andprovides good corrosion protection.This solution is also suited to the warm season, as it is less prone to evaporative loss and will reduce the need for top-ups.In addition, less water evaporation means fewer minerals salts depositing in the radiator, which helps preserve theefficiency of the cooling system.When the outside temperature drops below freezing, check the coolant circuit frequently and add more anti-freeze (up to60% maximum) to the solution.Use distilled water in the coolant mixture. Tap water will damage the engine.Refer to the chart given below and add water with the quantity of anti-freeze to obtain a solution with the desired freezingpoint:
Freezing point °F (°C) Coolant % of volume-4 (-20) 35-22 (-30) 45-40 (-40) 55
IMPORTANT The different brands of anti-freeze available on the market have varying specifications. Always readproduct label to determine the degree of protection afforded.
WARNINGUse only nitrite-free anti-freeze and corrosion inhibitors with a freezing point of -35°C as a minimum.
TIRES
WARNINGAn overinflated tire results in a hard, uncomfortable and less secure ride.Overinflation also affects grip, especially on curves and in the wet.An underinflated tire (insufficient pressure) can slip on the wheel rim, resulting in loss of control.Underinflation also affects grip and handling, as well as braking efficiency.Tire replacement and repair, and wheel servicing and balancing are delicate operations. They shouldbe carried out using adequate tools and are best left to experienced mechanics.New tires may be covered by a thin protective cover which has reduced grip. Ride carefully for thefirst few kilometers (miles).Never use any kind of rubber treatment product on the tires.In particular, take care not to allow the tire to come into contact with liquid fuel, which rapidlydeteriorates the tire rubber.A tire which has come into contact with oil or fuel cannot be cleaned and must be replaced.
DANGERCertain OEM tires are equipped with wear indicators.There are various types of wear indicators.Contact your Dealership for tire checking information.Check tire wear visually and have the tires replaced when they are worn.If a tire deflates during a ride, do not attempt to continue the trip.Avoid sudden braking or steering maneuvers, and do not decelerate rapidly.Slowly decelerate and move to the edge of the road braking with the engine until you come to astandstill.Failure to observe these instructions can result in serious accidents, with the risk of serious personalinjury or death.Never use tube tires on tubeless tire rims, or vice versa.
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1.4. RUNNING-IN1.4.1. RUNNING-IN
Proper engine running-in is essential to preserving engine life and performance over time.Twisty roads and gradients are ideal to break in engine, suspension and brakes effectively.Varying speed frequently is also recommended.This will vary the amount of stress placed on vehicle components continuously, allowing engine parts to cool down whenless stressed.While it is important to put a certain amount of stress to engine components during the running-in period, it is equallyimportant to spare the engine at this stage in vehicle's life.
WARNINGTop acceleration performance is only obtained after covering the first 1243 mi (2000 km).
Observe the following instructions:• Avoid harsh accelerations and do not flip the throttle open abruptly when the engine is running at low speed, both
during and after the running-in period.• Apply the brakes gently and avoid hard, prolonged braking for the first 62 mi (100 km). This will allow the brake pad
lining to wear in properly rubbing on the brake discs.• Never exceed 5000 rpm during the first 932 mi (1500 km) (see chart).
WARNINGAfter the first 932 mi (1500 km), perform the checks listed in the post running-in column of thePERIODIC MAINTENANCE CHART. Failure to perform these checks may lead to personal injury toyourself or third persons, or vehicle damage.
• Between the first 932 mi (1500 km) and 1243 mi (2000 km), a somewhat brisker riding style is acceptable. Vary yourspeed and use peak acceleration for just a few instants, to allow the different components to become properlyseated against one another. However, avoid exceeding 6000 rpm (see chart).
• After 1243 mi (2000 km), the engine will be ready for a more demanding use. However, never exceed the maximumengine speed allowed (7600 rpm).
Recommended maximum engine speed in rpmDistance covered in mi (km) Giri/min (rpm)0÷932 (1500) 5000932÷1243 (1500÷2000) 6000Over 1243 (2000) 7600
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1.5. LOCATION OF SERIAL NUMBERS1.5.1. LOCATION OF SERIAL NUMBERS
These numbers are necessary for vehicle registration.
IMPORTANT: Altering the identification numbers of vehicleor engine is a legal offence punishable by heavy fines andpenalties. In addition, altering the frame number (VIN) resultsin immediate warranty invalidation.
ENGINE NUMBER
The engine number is punched on the right hand side of theengine next to the oil level plug.
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PERIODIC MAINTENANCE 2
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TABLE OF CONTENETS2.1. GENERAL TECHNICAL INFORMATION ......................................................................................................... 3
2.1.1. TECHNICAL DATA.................................................................................................................................... 32.1.2. LUBRICANT CHART ................................................................................................................................. 42.1.3. TIGHTENING TORQUES.......................................................................................................................... 52.1.4. SPECIAL TOOLS ...................................................................................................................................... 6
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2.1. GENERAL TECHNICAL INFORMATION2.1.1. TECHNICAL DATA
ENGINE TRANSMISSION
ENGINEType Two-cylinder 4-strokeNumber of cylinders TwoCylinder layout 90° VPistons forged, two compression rings, one oil control ringBore 3.14 in (80 mm)Stroke 2.91 in (74 mm)Total displacement 45.40 cu in (744 cc)Cooling AirAir cleaner dry cartridge typeCompression ratio 9.6:1Maximum horsepower (CE correction) 35.5 kW at 6800 rpmMaximum torque (CE correction) 40.34 ftlb (54.7 Nm) at 3600 rpmEngine idle rpm 1100 ± 100 rpm
TIMINGTiming diagram: 2 valves with push-rods and rockersintake valve opens 18° B.T.D.C.intake valve closes 50° A.B.D.C.exhaust valve opens 53° B.B.D.C.exhaust valve closes 15° A.T.D.C.Values valid with clearance between rockersand valve
0.006 in (0.15 mm) intake0.008 in (0.20 mm) exhaust
FUEL SUPPLYType Electronic injection (Weber Marelli)Choke Ø 1.42 in (36 mm)Fuel Premium grade unleaded petrol, minimum octane rating 95 (N.O.R.M.)
and 85 (N.O.M.M.)
STARTINGElectric
EXHAUSTThree-way manifold with catalyzer
TRANSMISSION- clutch dry single disc with cush drive- primary transmission gear-type, ratio: 16/21 = 1:1.3125- gearbox 5 gears- gear ratios:1st 11/26 = 1:2.36362nd 14/23 = 1:1.64293rd 18/23 = 1:1.27784th 18/19 = 1:1.05565th 20/18 = 1:0.9- final transmission cardan shaft type- ratio 8/33 = 1:4.825Lubrication Pressure system, valve adjustment, lobe pump
SPARK PLUGSStandard NGK BR8ESSpark plug gap 0.024 0.028 in (0.6 0.7 mm)Resistance 5 KΩ
CAPACITIESEngine oil Oil and filter change 1.78 l (0.47 gal)Transmission oil 170 cm3 (10.37 in3)Gearbox oil 1000 cm3 (61 in3)
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2.1.2. LUBRICANT CHART
LUBRICANT PRODUCTEngine oil RECOMMENDED: RACING 4T
Alternatively, use quality branded oil with performance equal to or betterthan CCMC G-4 A.P.I. SG.
Transmission oil RECOMMENDED: TRUCK GEAR 85 W 140Gearbox oil RECOMMENDED: ROTRA MP/S 80 W 90Bearings and other lubrication points RECOMMENDED: BIMOL GREASE 481, AUTOGREASE MP or
GREASE SM2.As an alternative to recommended grease, use quality branded rollingbearing grease with operating temperature -30°C...+140°C, with droppingpoint 150°C...230°C, high corrosion protection, good resistance to waterand oxidisation.
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2.1.3. TIGHTENING TORQUES
DESIGNATION TIGHTENINGTORQUES (ftlb)
Cylinder head covers fixing screws 7,38Spark plugs 18,44
Cylinder heads-barrels to crankcase fixing nut (M10) 29.50÷30.98Cylinder heads-barrels to crankcase fixing nut (M8) 20.65÷22.13Crankcases joining nuts (M8) 16.23÷18.44Crankcases joining nuts (M10) 29.50÷30.98Timing cover fixing screws 7,38Oil sump fixing screws 7,38Valves cover insert fixing screws 3,69
Connecting rod screws 22.13÷23.60Flywheel to crankshaft fixing screws 29,5Ring gear fixing screws 7,38
Camshaft to crankcase fixing connection 22,13Timing gear to camshaft fixing screws 18,44Phonic wheel fixing screws 18,44
Starter motor fixing screws 18,44
Injector cap fixing screws M5 2,95Intake manifolds to heads fixing screws 7,38
Engine oil pressure sensor 5.90÷7.38Oil pump to crankcase fixing screws 7,38Filter cartridge sealing cover fixing screw 18,44
Alternator stator fixing screws 3,69Alternator rotor nut 59
Clutch shaft fixing nut 73.76
Primary shaft fixing nuts 47.94Cover to gearbox fixing screws 7,38Gearbox to clutch housing cover fixing screws 7,38Index lever fixing nut 4,42
CYLINDER HEADS
CRANKCASE AND COVERS
CONNECTING ROD GROUP
TIMING UNIT
ELECTRIC STARTING
FUEL SUPPLY
LUBRICATION
IGNITION
CLUTCH
GEARBOX
PERIODIC MAINTENANCE
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2.1.4. SPECIAL TOOLS
PERIODIC MAINTENANCE
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Key:
Location Tool designation and application Part number1 Bush for fitting oil seal on secondary shaft 19 92 73 002 Tool for fitting oil seal on timing cover (crankshaft) 19 92 72 203 Valves disassembly / assembly tool 10 90 72 004 Punch for bevel gear pair pinion oil seal 19 92 61 005 Bevel gear pair alignment preassembly tool 19 92 88 006 Punch for clutch shaft bearing on case 19 92 94 007 Punch for transmission case oil seal 19 92 60 008 Punch for clutch shaft oil seal 19 90 59 009 Punch for assembling oil seal on gearbox cover for secondary shaft 19 92 72 0010 Clutch disk assembly and centring tool 19 90 65 0011 Flywheel holder tool 19 91 18 0012 Spacer for installation of ring on secondary shaft 19 92 72 0213 Puller for internal ring on hollow shaft 19 90 70 0014 Puller for transmission case bearing external ring 19 92 75 0015 Punch for bearing on bevel gear pair pinion 19 92 62 0016 Intermediate gear holding tool for removal of gearbox 19 92 77 0017 Punch for primary shaft bearing on gearbox 19 92 63 0018 Punch for taper roller bearing outer race on bevel gear pair pinion holder body 19 92 64 0019 Punch for transmission case bearing outer race 19 92 65 0020 Puller for swing arm holder bearing on gearbox cover 19 92 76 0021 Reducer bush for valve disassembly tool (this tool is marked with No. 10 90 72 00) 19 92 78 0022 Punch for driving bearing inner race onto hollow shaft 19 92 79 0023 Tool for assembling oil seal on crankshaft - flywheel side 12 91 20 0024 Punch for driving oil seal onto flange and crankshaft flywheel side 19 92 71 0025 Clutch shaft holding tool 19 90 71 6026 Clutch shaft nut holding wrench 19 90 54 6027 Gearbox support 19 90 25 0028 Graduated disk 19 92 96 0029 Punch for mounting cap on valve guide 19 92 60 2030 Tool for assembling oil seal to timing cover (camshaft) 19 92 73 2031 Secondary shaft bearing outer race inserter tool 19 92 64 60
GEARBOX
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GEARBOX 3
GEARBOX
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TABLE OF CONTENTS3.1. GEARBOX ........................................................................................................................................................ 3
3.1.1. DISASSEMBLY ......................................................................................................................................... 33.1.2. REASSEMBLY .......................................................................................................................................... 73.1.3. TIGHTENING TORQUES........................................................................................................................ 11
3.2. CLUTCH HOUSING........................................................................................................................................ 123.2.1. DISASSEMBLY ....................................................................................................................................... 123.2.2. REASSEMBLY ........................................................................................................................................ 153.2.3. TIGHTENING TORQUES........................................................................................................................ 19
3.3. TRANSMISSION............................................................................................................................................. 203.3.1. TRANSMISSION GEARS........................................................................................................................ 20
GEARBOX
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3.1. GEARBOX3.1.1. DISASSEMBLY
• Fit the clutch shaft to the gearbox in such a way thatthe gear itself meshes with the primary shaft gear.
• Fit the provided holding tool to the grooves in the clutchshaft.
• Undo the nut retaining the intermediate gear and extractthe thrust washer.
GEARBOX
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• Remove the gear and the clutch shaft.
• Unscrew the breather cap together with its lug.
GEARBOX
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• Undo and remove the neutral gear indicator.
• Undo the bolts retaining the gearbox cover andremove it by tapping lightly with a mallet.
• Slacken off the locknut and undo the preselectoradjuster eccentric screw.
GEARBOX
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• Extract the preselector and remove its seal ring.
• After having removed the retainer plate fixingscrews, remove the entire gearing, shaft and forkassembly.
GEARBOX
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3.1.2. REASSEMBLY
REASSEMBLING THE PRESELECTOR• After having refitted the entire gearing assembly
including shafts to the gearbox cover, fit the spring andits two extensions over the preselector pawl, makingsure that the spacing between the spring extensions isthe same on the pawl as between their free extremities.
• Refit the eccentric adjuster screw and locknut to thecover, taking care that the eccentric section of the screwis oriented towards the preselector nut.
GEARBOX
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• Refit the preselector spacer.
• Fit the preselector to the cover, making sure thatthe two spring extensions fit into the concavity in theadjuster screw. Turn the screw by 90° and tighten downthe lock nut.
• Refit the gasket, and tighten the gearbox cover screwsto their specified torque.
GEARBOX
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• Fit the gear and washer to the primary shaft andtighten the fixing nut to the specified torque and snug itin with a punch.
GEARBOX
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GEARBOX
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3.1.3. TIGHTENING TORQUES
Primary shaft fixing nuts 47.94 ftlbCover to gearbox fixing screws 7.38 ftlbGearbox to clutch housing cover fixing screws 7.38 ftlbIndex lever fixing nut 4.42 ftlb
GEARBOX
GEARBOX
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3.2. CLUTCH HOUSING3.2.1. DISASSEMBLY
• Once the gearbox/clutch housing are mounted to theholder, itself locked in a vice, fit the holding tool andslacken off the nut by rotating the shaft with theprovided tool.
• Unscrew the Allen screws securing the clutch housing tothe gearbox.
GEARBOX
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• Disconnect and remove the housing complete withclutch shaft, using light taps with a mallet around the rimof the housing itself.
• Remove the gasket.
• Unscrew the three screws with washers andremove the bearing plate.
GEARBOX
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• Undo the clutch shaft fixing nut.
• Extract the clutch shaft and remove the seal ring.
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3.2.2. REASSEMBLY
• Refit the clutch shaft by lightly tapping with a plasticmallet, refit the circlip and seal ring.
GEARBOX
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• Fit the retaining plate and screw in the screws withwashers (use thread sealant).
• Fit the clutch housing gasket and locate the housingitself.
GEARBOX
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• Screw in the Allen bolts and external screws andtighten to their specified torque.
• Screw in the clutch shaft nut with the provided tool andsnug it in with a punch.
• Fit the breather cap.
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• Screw in the neutral gear switch.
• Fit the clutch control rod to the shaft with its larger endoriented towards the control lever.
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3.2.3. TIGHTENING TORQUES
Clutch shaft fixing nut 73.76 ftlb
CLUTCH
GEARBOX
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3.3. TRANSMISSION3.3.1. TRANSMISSION GEARS
1. Primary shaft2. Gear3. Clearance washer4. Circlip5. Gear6. Gear7. Roller cage8. Gear9. Intermediate gear10. Bearing11. Thrust washer12. Safety nut13. Bearing14. Secondary shaft15. Spacer16. Bearing17. Spacer18. Seal ring19. Circlip20. Gear21. Gear22. Gear23. Gear24. Gear
25. Thrust washer26. Bearing27. Shim28. Drip collector29. Circlip30. Spring washer31. Spring washer32. Gear selector drum33. Pawl34. Circlip35. Fork36. Fork37. Roller38. Pin39. Preselector assembly40. Spacer41. Selector return spring42. Lever43. Washer44. Spring45. Plate46. Screw47. Washer48. Nut
ENGINE
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ENGINE 4
ENGINE
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TABLE OF CONTENTS4.1. GEARBOX AND STARTER MOTOR REMOVAL ............................................................................................. 4
4.1.1. REMOVAL THE GEARBOX FROM THE ENGINE .................................................................................... 44.1.2. REMOVING THE STARTER MOTOR ....................................................................................................... 54.1.3. REMOVING THE OIL INTAKE PIPE FROM THE CRANKCASE .............................................................. 64.1.4. TIGHTENING TORQUES.......................................................................................................................... 7
4.2. CYLINDER HEAD COVERS............................................................................................................................. 84.2.1. CYLINDER HEAD COVERS REMOVAL ................................................................................................... 84.2.2. INSPECTION............................................................................................................................................. 94.2.3. REASSEMBLY ........................................................................................................................................ 104.2.4. TIGHTENING TORQUES........................................................................................................................ 11
4.3. TIMING ........................................................................................................................................................... 124.3.1. REMOVING THE FRONT ENGINE COVER ........................................................................................... 124.3.2. DISASSEMBLING THE ALTERNATOR .................................................................................................. 134.3.3. REV AND STROKE SENSOR REMOVAL............................................................................................... 154.3.4. REMOVING THE TIMING UNIT COVER................................................................................................. 164.3.5. TIMING UNIT INSPECTION.................................................................................................................... 184.3.6. REASSEMBLING THE TIMING UNIT ..................................................................................................... 214.3.7. TIMING CHECK....................................................................................................................................... 244.3.8. ASSEMBLING THE PHONIC WHEEL..................................................................................................... 264.3.9. CHECKING THE AIR GAP AND REASSEMBLING THE SENSOR ........................................................ 274.3.10. REASSEMBLING THE ALTERNATOR................................................................................................ 294.3.11. TIMING DATA ...................................................................................................................................... 314.3.12. TIGHTENING TORQUES .................................................................................................................... 32
4.4. ENGINE PRESSURE PLATE FLYWHEEL..................................................................................................... 334.4.1. DISASSEMBLING THE FLYWHEEL ....................................................................................................... 334.4.2. INSPECTION........................................................................................................................................... 354.4.3. ASSEMBLING THE CLUTCH PLATE AND DISK.................................................................................... 364.4.4. TIGHTENING TORQUES........................................................................................................................ 38
4.5. ENGINE PRESSURE PLATE FLYWHEEL..................................................................................................... 394.5.1. DISASSEMBLING THE FLYWHEEL ....................................................................................................... 394.5.2. INSPECTION........................................................................................................................................... 414.5.3. REASSEMBLING THE PRESSURE PLATE FLYWHEEL ....................................................................... 424.5.4. TIGHTENING TORQUES........................................................................................................................ 44
4.6. CYLINDER HEADS ........................................................................................................................................ 454.6.1. DISASSEMBLING THE CYLINDER HEADS ........................................................................................... 454.6.2. DISASSEMBLING THE VALVES FROM THE CYLINDER HEADS ........................................................ 474.6.3. DISASSEMBLING THE VALVE GUIDE FROM THE CYLINDER HEAD................................................. 494.6.4. REASSEMBLING AND CHECKING THE VALVE SEATS....................................................................... 504.6.5. RE-CUTTING THE VALVE SEATS ......................................................................................................... 524.6.6. SPRING PACK INSPECTION ................................................................................................................. 554.6.7. REASSEMBLING THE CYLINDER HEADS............................................................................................ 574.6.8. TIGHTENING TORQUES........................................................................................................................ 59
4.7. CYLINDERS ................................................................................................................................................... 604.7.1. DISASSEMBLING THE CYLINDERS...................................................................................................... 604.7.2. INSPECTION........................................................................................................................................... 614.7.3. ASSEMBLING THE CYLINDERS............................................................................................................ 624.7.4. TIGHTENING TORQUES........................................................................................................................ 64
4.8. PISTONS ........................................................................................................................................................ 654.8.1. DISASSEMBLING THE PISTONS........................................................................................................... 654.8.2. INSPECTION........................................................................................................................................... 664.8.3. REASSEMBLING THE PISTONS............................................................................................................ 68
4.9. PISTON RINGS AND OIL CONTROL RING................................................................................................... 704.9.1. DISASSEMBLY ....................................................................................................................................... 704.9.2. PISTON RINGS INSPECTION ................................................................................................................ 714.9.3. REASSEMBLING THE PISTON RINGS AND OIL CONTROL RING ...................................................... 72
4.10. CRANKCASE.................................................................................................................................................. 734.10.1. DISASSEMBLING THE CRANKCASE................................................................................................. 734.10.2. INSPECTION ....................................................................................................................................... 764.10.3. REASSEMBLING THE CRANKCASE.................................................................................................. 774.10.4. TIGHTENING TORQUES .................................................................................................................... 81
4.11. CONNECTING RODS .................................................................................................................................... 824.11.1. DISASSEMBLING THE CONNECTING RODS ................................................................................... 824.11.2. CONNECTING ROD CLEARANCE ..................................................................................................... 834.11.3. REASSEMBLING THE CONNECTING RODS .................................................................................... 844.11.4. TIGHTENING TORQUES .................................................................................................................... 85
4.12. CRANKSHAFT................................................................................................................................................ 864.12.1. DISASSEMBLING THE CRANKSHAFT............................................................................................... 864.12.2. CRANKSHAFT INSPECTION.............................................................................................................. 884.12.3. TIGHTENING TORQUES .................................................................................................................... 89
ENGINE
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4.13. OIL SUMP .......................................................................................................................................................904.13.1. DISASSEMBLING THE OIL SUMP ......................................................................................................904.13.2. OIL SUMP INSPECTION......................................................................................................................934.13.3. REASSEMBLY......................................................................................................................................944.13.4. DISASSEMBLING THE OIL PUMP ......................................................................................................964.13.5. OIL PUMP INSPECTION......................................................................................................................984.13.6. REASSEMBLING THE OIL PUMP .....................................................................................................1004.13.7. DISASSEMBLING THE OIL PRESSURE CONTROL VALVE ............................................................1014.13.8. REASSEMBLING THE OIL PRESSURE CONTROL VALVE .............................................................1024.13.9. REASSEMBLING THE OIL TRANSMITTER ......................................................................................1034.13.10. TIGHTENING TORQUES ...................................................................................................................104
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4.1. GEARBOX AND STARTER MOTOR REMOVAL4.1.1. REMOVAL THE GEARBOX FROM THE ENGINE
• Undo the screws securing the gearbox to the engine
• Remove the gearbox
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4.1.2. REMOVING THE STARTER MOTOR
• Undo the starter motor fixing screws
• Remove the starter motor
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4.1.3. REMOVING THE OIL INTAKE PIPE FROM THE CRANKCASE
• Remove the oil vapor intake pipe from the crankcase
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4.1.4. TIGHTENING TORQUES
Starter motor fixing screws 18.44 ftlb
ELECTRIC STARTING
ENGINE
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4.2. CYLINDER HEAD COVERS4.2.1. CYLINDER HEAD COVERS REMOVAL
• Undo the screws retaining them and remove the coversand gaskets from the cylinder heads
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4.2.2. INSPECTION
• Check that the head cover contact surfaces are notdamaged and that there are no blowholes
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4.2.3. REASSEMBLY
• Replace the cover gaskets and refit the covers to thecylinder heads
• Screw in the screws in a crosswise pattern and tightento the specified torque with a torque wrench
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4.2.4. TIGHTENING TORQUES
Cylinder head covers fixing screws 7.38 ftlbSpark plugs 18.44 ftlb
CYLINDER HEADS
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4.3. TIMING4.3.1. REMOVING THE FRONT ENGINE COVER
• Undo the fixing screws and remove the alternator unitcovers
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4.3.2. DISASSEMBLING THE ALTERNATOR
• Unscrew the screws securing the stator to the timingcover and extract it.
• Unscrew the rotor to crankshaft fixing nut, withdraw therotor and remove the key
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4.3.3. REV AND STROKE SENSOR REMOVAL
• Remove the two securing screws and slip strokesensor out.
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4.3.4. REMOVING THE TIMING UNIT COVER
• Unscrew the fixing screws and remove the timing unitcover and gasket
• Remove the chain tensioner
• Unscrew the screw retaining the phonic wheel andremove it.
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• Remove the two screws and timing gear from the shaft,together with the chain and oil pump gear.
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4.3.5. TIMING UNIT INSPECTION
DISASSEMBLING THE ROCKERS• Remove the circlips and extract the two rockers and oil
delivery connector.
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• Check that the pin itself is not excessively worn on therocker contact surface.
• Check the valve and rod rocker contact surfaces.
FITTING THE ROCKERS• Check that the lengthwise slot is oriented towards the
oil delivery line.
IMPORTANT Pay special attention to the correct orientationof the washers at the time of reassembly.
• Fit the oil delivery connector and rockers to the shaftand secure them with the circlips
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• Check that the rocker control rods are straight, and thatthe end contact surfaces show no signs of seizure,otherwise replace them.
• To check that the pressed ends on the rods are free ofclearance, allow the rods to fall onto a flat surface froma small height. If the rods emit a high, sharp sound onimpact, the ends are without play.
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4.3.6. REASSEMBLING THE TIMING UNIT
• Move the left cylinder piston to the top dead centre(PMS) position and check that the crankshaft gearreference mark is at the top on a perpendicular axis .
• Position the timing shaft with the gear reference pindownwards.
• Fit the (pin) key securing the oil pump shaft.
• Fit the two gears with the timing belt and check theposition of the reference marks. Tighten the screwswith a torque wrench to the specified torque.
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• Screw the oil pump nut while holding the oil pump shaftitself immobile.
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• Fit the chain tensioner and tighten to the specifiedtorque with a torque wrench.
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4.3.7. TIMING CHECK
• Fit the goniometer and dial gauge, then move thecylinder to the top dead centre position in compressionand read the exact position off the dial gauge.
• Reset the goniometer at the top dead centre (PMS)position on the dial.
• Adjust the valves to the theoretical clearanceprescribed.
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• Turn clockwise until the rod and rockers come intocontact and check the intake valve opening advancerelative to the top dead centre.
• Continue turning until the rod is again free and read thevalue of the closing delay relative to the bottom deadcentre.
• Repeat for the other valves.• Adjust the clearance of the valves to the specified
value.
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4.3.8. ASSEMBLING THE PHONIC WHEEL
• The phonic wheel is located by a pin on the timingshaft.
• Fit the phonic wheel correctly to the timing shaft withthe pin located in the slot, and tighten to the specifiedtorque with a torque wrench.
• Fit the gasket and timing unit cover, and tighten to thespecified torque with a torque wrench.
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4.3.9. CHECKING THE AIR GAP AND REASSEMBLING THE SENSOR
• Fit a plain washer to the sensor and measure itsthickness.
• Place the sensor on the timing unit cover and bring itinto contact with the phonic wheel.
• Use a thickness gauge to measure the gap betweenthe fixing plate and cover. Subtract the thickness of theplain washer to determine the gap between the sensorand phonic wheel.
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• Remove the washer and fit the sensor after havingsmeared the fixing plate surface with sealant andtighten the screws to the specified torque.
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4.3.10. REASSEMBLING THE ALTERNATOR
• Fit the mounting washer, key and rotor, and close thenut with a torque wrench tightening to the specifiedtorque.
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• Fit the stator and its cover and screw in the threeretaining screws.
• Fit the stator cover.
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4.3.11. TIMING DATA
Intake:- opens 18° before T.D.C.;- closes 50° after B.D.C.
Exhaust:- opens 53° before B.D.C.;- closes 15° after T.D.C.
Valve clearance for timing check 0.039 in.Valve clearance for operation:- intake 0.006 in (mm 0.15);- exhaust 0.008 in (mm 0.20).
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4.3.12. TIGHTENING TORQUES
Camshaft to crankcase fixing connection 22.13 ftlbTiming gear to camshaft fixing screws 18.44 ftlbPhonic wheel fixing screws 18.44 ftlb
TIMING UNIT
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4.4. ENGINE PRESSURE PLATE FLYWHEEL4.4.1. DISASSEMBLING THE FLYWHEEL
• Remove the circlip and clutch engage/disengageretainer.
• Unscrew the screws securing the pressure plateflywheel to the crankshaft and remove it.
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4.4.2. INSPECTION
• Check that the clutch disk is not scored or heavilyworn.
• Check the cush drive springs, and make sure theclutch disk is not worn to less than the specifiedthickness, otherwise replace it.
• Check the wear of the gear teeth and clutch diskcontact surface.
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4.4.3. ASSEMBLING THE CLUTCH PLATE AND DISK
• Fit the specified flywheel locking tool.
• Fit the retainer and seal ring.
• Fit the clutch disk centring tool to the plate and seat thedisk.
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• Fit the assembly onto the pressure plate flywheel andtighten the screws to the specified torque.
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4.4.4. TIGHTENING TORQUES
Clutch shaft fixing nut 73.76 ftlb
CLUTCH
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4.5. ENGINE PRESSURE PLATE FLYWHEEL4.5.1. DISASSEMBLING THE FLYWHEEL
• Remove the circlip and clutch engage/disengageretainer.
• Unscrew the screws securing the pressure plateflywheel to the crankshaft and remove it.
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4.5.2. INSPECTION
• Check that the flywheel is not scored on the diskcontact surface.
• Check that the crankshaft seating is not deformed,otherwise replace the flywheel.
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4.5.3. REASSEMBLING THE PRESSURE PLATE FLYWHEEL
• When reassembling the pressure plate flywheel to thecrankshaft, make sure that the yellow mark on the shaftis perfectly aligned with the groove on the flywheelitself.
• Screw in the screws and fit the flywheel locking tool.
• Tighten down the screws in a crosswise pattern to thespecified torque using a torque wrench. Werecommend replacing the engine shaft flywheel fixingscrews.
• Fit the clutch engage/disengage retainer and circlip.
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4.5.4. TIGHTENING TORQUES
Connecting rod screws 22.13÷23.60 ftlbFlywheel to crankshaft fixing screws 29.5 ftlbRing gear fixing screws 7.38 ftlb
CONNECTING ROD GROUP
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4.6. CYLINDER HEADS4.6.1. DISASSEMBLING THE CYLINDER HEADS
• Unscrew the nuts fixing the cylinder heads, cylindersand rocker pins to the crankcase in a crosswisepattern.
• Remove the upper spacers, pins complete withrockers, lower spacers and rocker control rods andremove the heads from the stud bolts.
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4.6.2. DISASSEMBLING THE VALVES FROM THE CYLINDER HEADS
• Fit the specified tool to the upper cup and at the centreof the head of the valve in question.
• Tighten down the tool so as to compress the springand knock the head of the tool with a mallet to removethe two half cones from the upper cup.
• Slacken off the tool and remove it from the head.
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• Extract the upper cup, the spring and the valve itself.
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4.6.3. DISASSEMBLING THE VALVE GUIDE FROM THE CYLINDER HEAD
• Remove the valve guide gaskets and extract the lowerspring cup.
IMPORTANT The valve guides should be replaced whenworn to the point that when only the valve is replaced theclearance between the valve stem and its seat in the valveguide can no longer be eliminated.
• The valve guides are removed with the aid of a specialpunch, knocking outwards with a mallet; to facilitate theprocedure, heat the head to 50-60 degrees.
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4.6.4. REASSEMBLING AND CHECKING THE VALVE SEATS
• Drive the valve guides into the head using the specialpunch and mallet and knocking inwards; to facilitate theoperation, heat the head to around 60°C (140°F).
• Once the valve guides are seated, ream its internaldiameter to the value given in the table.
Valves and valve guides assembly data
VALVE GUIDE INTERNALDIAMETER
in (mm)
VALVE STEM DIAMETERin (mm)
ASSEMBLYCLEARANCE
in (mm)IntakeExhaust
0.2165÷0.2173 (5.500÷5.520)0.2165÷0.2173 (5.500÷5.520)
0.2157÷0.2151 (5.480÷5.465)0.2157÷0.2151 (5.480÷5.465)
0.0007÷0.0021(0.020÷0.055)
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INTAKE
A øin (mm)
B(theoretical)
øin (mm)
C(theoretical)
in (mm)
Din (mm)
1.2598÷1.2596(32.0÷32.25) 1.3385 (34) 0.0559
(1.42)0.0393
(1)
EXHAUST
A øin (mm)
B(theoretical)
øin (mm)
C(theoretical)
in (mm)
Din (mm)
1.0913÷1.1011(27.72÷27.97) 1.1810 (30) 0.0629 (1.6) 0.0448
(1.14)
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4.6.5. RE-CUTTING THE VALVE SEATS
IMPORTANT The valve seats must be re-cut when the valveguides are replaced or in case of excessive clearance.
• Choose the appropriate pilot tool and mount it to thevalve guide.
• Select the appropriate mill for the diameter and angleof the valve seat itself.
• Fit the mill to the pilot and lower it gently to the level ofthe valve seat.
• Fit the T-handle to the mill shank and turn it clockwisewith a light pressure to mill out the valve contactsurface evenly.
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• Repeat the operation with the appropriate tool to millout the valve seat.
• Remove the tools at the end of the operation.• Insert the lower spring seats and fit the gaskets to the
valve guides using the specified tool.
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4.6.6. SPRING PACK INSPECTION
With the assembly (cups, springs, valves and half-cones) installed on the heads, the external springs must becompressed by 1.4173 in (36 mm). Note that at their fully open position the valves must have an additional 0.039 in (1mm) excursion before the internal spring is completely compressed. If necessary add or remove shims until the abovedimension is obtained.
Free length
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SPRING CHARACTERISTICS
DESCRIPTION UNIT VALUE
External diameter in (mm) /
Internal diameter in (mm) 0.7007 ± 0.0078 (17.8 ± 0.2)
Wire diameter in (mm) 0.1338 ± 0.0011 (3.4 ± 0.03)
Free length in (mm) 1.7165( 43.6)
Solid length in (mm) 1.0826 (27.5)
Test length L1 in (mm) 1.4173 (36)
Test length L2 in (mm) 1.1023(28)
Measured test load P1 lb (Kg) 38.8 ± 5% (17.6 ± 5%)
Measured test load P2 lb (Kg) 97 ± 3% (44 ± 3%)
Coil direction / right-hand
Spring class to UNI 7900/4 / CC
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4.6.7. REASSEMBLING THE CYLINDER HEADS
• Fit the new gasket and seat the cylinder head.
• Insert the lower rocker spacers, rocker control rods,rockers and upper spacers with their nuts.
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• Tighten down the nuts in a crosswise pattern to thespecified torque.
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4.6.8. TIGHTENING TORQUES
Cylinder head covers fixing screws 7.38 ftlbSpark plugs 18.44 ftlb
CYLINDER HEADS
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4.7. CYLINDERS4.7.1. DISASSEMBLING THE CYLINDERS
• Remove the cylinders and gaskets from the stud bolts.
• Remove the O-ring between the crankcase andcylinder.
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4.7.2. INSPECTION
• First check for superficial scoring and then check wearof the cylinder bore surfaces using a dial gauge.
• Measure the inside diameter of the cylinder bore atthree different heights, then turn the dial gauge through90° and repeat the measurements; the dial gauge mustbe first zero set on a ring gauge.
Key:1. 1st measurement2. 2nd measurement3. 3rd measurement4. control dimension for selection
Cylinder diameter selection
GRADE Din (mm)
GRADE Ein (mm)
GRADE Fin (mm)
3.1496 ÷ 3.1499(80.000÷80.010)
3.1499 ÷ 3.1504(80.010÷80.020)
3.1504 ÷ 3.1508(80.020÷80.030)
When fitting new units, cylinder grades "D-E-F" must bepaired with pistons selected for the corresponding grade.Assembly clearance between piston and cylinder:0.0019 ÷ 0.0027 in (0.050 ÷ 0.070 mm).
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4.7.3. ASSEMBLING THE CYLINDERS
• Check that the piston rings are mounted with their slotsat 120 degrees out of phase from each other.
• Fit the new gasket and the O-ring to the crankcase,and fit a standard piston ring compressor tool to thepiston.
• Lubricate the cylinder bore and the piston. Knock thepiston into the cylinder with the aid of a plastic mallet.
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• Once the piston is inserted beyond its rings, removethe compression tool and seat the cylinder.
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4.7.4. TIGHTENING TORQUES
Cylinder heads-barrels to crankcase fixing nut (M10) 29.50÷30.98 ftlbCylinder heads-barrels to crankcase fixing nut (M8) 20.65÷22.13ftlbCrankcases joining nuts (M8) 16.23÷18.44 ftlbCrankcases joining nuts (M10) 29.50÷30.98 ftlbTiming cover fixing screws 7.38 ftlbOil sump fixing screws 7.38 ftlbValves cover insert fixing screws 3.69 ftlb
CRANKCASE AND COVERS
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4.8. PISTONS4.8.1. DISASSEMBLING THE PISTONS
• Protect the cylinder seat and remove the two gudgeonpin clips.
• Extract the gudgeon pin using the specified screw tool,and remove the piston.
IMPORTANT When overhauling the engine decoke thepiston crowns and piston ring grooves.
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4.8.2. INSPECTION
• First check for superficial scoring and then check wearof the cylinder bore surfaces using a dial gauge.
• Measure the inside diameter of the cylinder bore atthree different heights then turn the dial gauge through90° and repeat the measurements; the dial gauge mustbe first zero set on a ring gauge.
Key:
1. 1st measurement2. 2nd measurement3. 3rd measurement4. control dimension for selection
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• Check the piston diameter at the specified height andon an axis perpendicular to the gudgeon pin.
• Selection values refer to the bare piston (withoutgraphite facing).
• Check that the selection mark and assembly arrowsare punch marked on the piston.
Piston diameter selection
GRADE Din (mm)
GRADE Ein (mm)
GRADE Fin (mm)
3.1472 ÷ 3.1476(79.940÷79.950)
3.1476 ÷ 3.1480(79.950÷79.960)
3.1480 ÷ 3.1484(79.960÷79.970)
IMPORTANT Graphite facing thickness when new: 0.0006±0.0002 in (0.015 ± 0.005 mm).
Gudgeon pin to piston bore assembly data
GUDGEON PIN EXTERNALDIAMETER
in (mm)
DIAMETER OF BORES INPISTONin (mm)
ASSEMBLY CLEARANCEin (mm)
0.7872 ÷ 0.7874(19.996 ÷ 20.000)
0.8661 ÷ 0.8663(22.000 ÷ 22.006)
From in 0.0002362 (mm 0.006)clearance to in 0.0000787 (mm 0.002)
interference
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4.8.3. REASSEMBLING THE PISTONS
• To reassemble the piston to the connecting rod smallend, heat the piston in an oil bath to around 140 °F(60°C) to facilitate fitting the gudgeon pin.
• Fit the gudgeon pin clip and mount the gudgeon pininserter tool to the piston.
• Position the piston and tool on the connecting rod andscrew down to drive in the gudgeon pin.
• When the gudgeon pin is installed, remove the tool andfit the second clip to secure the pin, having firstprotected the cylinder seat.
IMPORTANT The mounting position is shown by an arrowpointing in the direction of travel (forwards).
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4.9. PISTON RINGS AND OIL CONTROL RING4.9.1. DISASSEMBLY
• Remove the piston rings and oil control ring.
IMPORTANT Do not overstretch the piston rings whenextracting them from the piston as they may break.
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4.9.2. PISTON RINGS INSPECTION
• Use a feeler gauge to check that the assemblyclearance between ring and ring groove on the pistonis as specified.
top piston ring in 0.00118 ÷ 0.00244 (mm 0.030 ÷ 0.062);middle piston ring in 0.00118 ÷ 0.00244 (mm 0.030 ÷ 0.062);oil control ring in 0.00118 ÷ 0.00244 (0.030 ÷ 0.062 mm).
• Insert the piston rings one at a time into the cylindersquare to the cylinder wall and use a feeler gauge tocheck the end gap.
top and middle piston rings:in 0.00984 ÷ 0.01771 (mm 0.25 ÷ 0.45);oil control ring in 0.00787 ÷ 0.01771 (mm 0.20 ÷ 0.45).
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4.9.3. REASSEMBLING THE PISTON RINGS AND OIL CONTROL RING
• Fit the piston rings paying attention to the position ofslots and rings and making sure to space the slots at120° around the piston.
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4.10. CRANKCASE4.10.1. DISASSEMBLING THE CRANKCASE
• Unscrew the four internal crankcase nuts and the sixexternal ones.
• Fit a rod into the seat of the tie rod securing the engineto the frame and lightly knock it with a plastic mallet toseparate the two halves of the crankcase.
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• Remove the upper crankcase half, taking care not todamage the contact surfaces.
• Remove the crankshaft complete with connecting rodsand half-shells.
• Unscrew the oil pressure sensor from the uppercrankcase half and remove the timing shaft retainerbushing; then extract the shaft and tappets and markthem.
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4.10.2. INSPECTION
• Check that the contact surfaces are in good conditionand not scored or dented. Remove the liquid sealresidue with trichloroethylene.
• Check that the stud bolt threads are not dented orstripped, otherwise replace the stud bolts.
• Use compressed air to blow out all lubrication ducts inthe two crankcase halves.
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4.10.3. REASSEMBLING THE CRANKCASE
• Lubricate and fit the tappets.
• Fit the timing shaft into its seat in the upper crankcasehalf; lubricate, fit and secure the timing shaft retainerbushing.
• Fit the timing side and flywheel side half shells to theupper crankcase half together with their thrust washers.Lubricate all parts before installing them.
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• Lubricate and fit the seal ring to the engine shaft andmount the assembly to the crankcase, taking care toseat the connecting rods correctly.
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• Lubricate and mount the half shells to the lowercrankcase half, and smear the crankcase half contactsurfaces with the specified sealant.
• Mount the two crankcase halves and seat them byknocking lightly with a mallet. Tighten the four centralstud bolts and external nuts to the specified torque in acrosswise pattern.
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4.10.4. TIGHTENING TORQUES
Cylinder heads-barrels to crankcase fixing nut (M10) 29.50÷30.98 ftlbCylinder heads-barrels to crankcase fixing nut (M8) 20.65÷22.13ftlbCrankcases joining nuts (M8) 16.23÷18.44 ftlbCrankcases joining nuts (M10) 29.50÷30.98 ftlbTiming cover fixing screws 7.38 ftlbOil sump fixing screws 7.38 ftlbValves cover insert fixing screws 3.69 ftlb
CRANKCASE AND COVERS
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4.11. CONNECTING RODS4.11.1. DISASSEMBLING THE CONNECTING RODS
• Once the crankshaft assembly together withconnecting rods has been removed from the uppercrankcase half, undo the screws and separate the rodfrom its small end taking care to observe the referencemarks and assembly orientation.
• Remove the half shells from the connecting rods andtheir small ends.
IMPORTANT Repeat for the other connecting rod.
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4.11.2. CONNECTING ROD CLEARANCE
• Use a micrometer to check the diameter of the crankpin on its orthogonal axes and in the half shell contactpatches, and check the size of the timing side and flywheel side bearing seats.
• Torque the connecting rod screws to their specified torque without the half shells mounted and use a dial gauge tomeasure the external diameter of the half shell seats; use a round point micrometer to measure the thickness of thetwo half shells themselves.
• Check that the bushes driven into the small ends have no seizing marks or deep scoring; otherwise replace them.
Big end diameter 1.7187÷1.7192 in (43.657÷43.670 mm).Shaft diameter 1.5746÷1.5748 in (39.995÷40.001 mm).Clearance between crank pin and connecting rod big end bearing at 90° from the mating faces: min. 0.00078 in (0.020mm), max. 0.00240 in (0.061 mm).
Connecting rod bearing thicknesses
NORMAL (production)A
in (mm)B
in (mm)0.0605÷0.0607(1.537÷1.543)
0.0601÷0.0603(1.527÷1.533)
Diameter of bush driven into connecting rod small end and gudgeon pin
INSIDE DIAMETER FOR BUSHINGDRIVEN INTO CONNECTING ROD
SMALL ENDin (mm)
DIAMETER OF GUDGEON PINin (mm)
SMALL END BUSHING TOGUDGEON PIN ASSEMBLY
CLEARANCEin (mm)
0.7090÷0.7094(18.010÷18.020)
0.7085÷0.7086(17.996÷18.000)
0.00039÷0.00094(0.010÷0.024)
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4.11.3. REASSEMBLING THE CONNECTING RODS
• Before fitting the parts take care to observe thereference marks and assembly orientation.
• Reassemble the connecting rods onto the crankshaftseat on the crank pin and tighten the screws to thespecified torque.
CHECKING THE CONNECTING ROD SHIMSCheck that the assembly clearance between the connectingrod shims and crankshaft is within tolerance:
0.0104÷0.0202 in (0.265÷0.515 mm).
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4.11.4. TIGHTENING TORQUES
Connecting rod screws 22.13÷23.60 ftlbFlywheel to crankshaft fixing screws 29.5 ftlbRing gear fixing screws 7.38 ftlb
CONNECTING ROD GROUP
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4.12. CRANKSHAFT4.12.1. DISASSEMBLING THE CRANKSHAFT
• Remove the connecting rods from the crankshaft.• Undo the oil cap and carefully clean the oil ducts
leading to the connecting rods and main journals.
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4.12.2. CRANKSHAFT INSPECTION
• Smear the oil cap with thread sealant and screw it insnugly.
• Use compresed air to clean out the lubrication ducts.
IMPORTANT As the crankshaft is nitrided it cannot beground; therefore, when it displays wear, out of round, ordeep scoring, the crankshaft itself must be renewed.
Diameter of timing side crankshaft journal
Normal (production) in (mm)1.5757÷1.6931 (40.023÷43.007)
Diameter of flywheel side main bearing seat
Normal (production) in (mm)1.8555÷1.8559 (47.130÷47.142)
Total thickness for flywheel side main bearing
Normal (production) in (mm)0.0804÷0.0807 (2.044÷2.050)
Clearance between crankshaft and flywheel side mainbearing
Normal (production) in (mm)0.00027÷0.00185 (0.007÷0.047)
Diameter of flywheel side crankshaft journal
Normal (production) in (mm)1.5746÷1.5752 (39.995÷40.011)
Thickness of thrust half washer on flywheel side mainbearing
Normal (production) in (mm)0.0909÷0.0929 (2.310÷2.360)
Main bearing journal to shell clearance
Normal (production) in (mm)0.01377÷0.01574 (0.35÷0.40)
maximum parallelism error of the two crankshaft axes(crankpin and flywheel / timing side main journals) must beno greater than 0.00078 in (0.02 mm), at a distance of1.5747 in (40 mm).
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4.12.3. TIGHTENING TORQUES
Connecting rod screws 22.13÷23.60 ftlbFlywheel to crankshaft fixing screws 29.5 ftlbRing gear fixing screws 7.38 ftlb
CONNECTING ROD GROUP
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4.13. OIL SUMP4.13.1. DISASSEMBLING THE OIL SUMP
• Unscrew the screw securing the oil filter to the sump.
• Remove the filter cartridge.
• Undo the screws securing the sump to the crankcaseand remove it together with its gasket.
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• Remove the oil level indicator.
• Flatten out the locking tab and remove the mesh filterretainer screw and mesh filter itself from the sump.
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4.13.2. OIL SUMP INSPECTION
• Check that the mesh filter is clean, otherwise wash itand blow it out with compressed air.
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4.13.3. REASSEMBLY
• Fit the filter, locking tab and fixing screw and tightendown.
• Bend the locking tab.
• Fit the gasket between the sump and crankcase(always fit a new one). Take care to fit the gasketcorrectly as incorrect installation can lead to faulty oildelivery.
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• Screw in the sump screws in a crosswise pattern andtighten to the specified torque with a torque wrench.
• Fit the filter cartridge and tighten its screw to thespecified torque.
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4.13.4. DISASSEMBLING THE OIL PUMP
• After having removed the timing unit, remove the oilpump from the crankcase by undoing the Allen screws.Disassemble the pump as follows:
• Remove the fixing key.• Extract the pump driveshaft and internal rotor.• Extract the external rotor.
• Extract the bearings and internal seat from the pumpbody.
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4.13.5. OIL PUMP INSPECTION
OIL PUMP BODYCheck that the faces and internal seats of the pump body arenot scored, damaged or dented.Oil pump data:- ø of seat for external rotor 1.6003÷1.6013 in
(40.650÷40.675 mm);- ø of bore for pump drive shaft 0.4730÷0.4741 in
(12.016÷12.043 mm);- ø of seat for roller bearings 0.8650÷0.8658 in
(21.972÷21.993 mm);- thickness of seat for external rotor 0.7492÷0.7507 in
(19.030÷19.070 mm).
EXTERNAL ROTORCheck that the internal and external surfaces and the facesare not scored or damaged, otherwise renew both rotors.External rotor data:- external ø 1.5960÷1.5972 in (40.540÷40.570 mm);- internal ø 0.9529÷0.9539 in (24.205÷24.230 mm);- thickness 0.7464÷0.7476 in (18.960÷18.990 mm).
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INTERNAL ROTORCheck that the internal and external surfaces and the facesare not scored or damaged, otherwise renew both rotors.Internal rotor data:- external ø 1.1710÷1.1720 in (29.745÷29.770 mm);- ø of bore for pump drive shaft 0.4724÷0.4731 in
(12.000÷12.018 mm);- thickness 0.7464÷0.7476 in (18.960÷18.990 mm).
ROLLER BEARINGSCheck that the bearing rollers are not damaged, otherwiserenew the bearings.
OIL PUMP DRIVE SHAFTCheck that the drive shaft is not damaged and that thethreads are in good condition, that the keyway is not burredand that the end that operates in the internal rotor is notdamaged, otherwise renew the shaft.Shaft data:- ø for pump body bore 0.4717÷0.4724 in (11.982÷12.000
mm);- ø for roller bearings 0.3933÷0.3936 in (9.991÷10.000
mm).
ASSEMBLY CLEARANCES- between pump body and external rotor
0.00314÷0.00531 in (0.080÷0.135 mm);- between bore on internal rotor and pump drive shaft
0.00062÷0.00240 in (0.016÷0.061 mm);- between bore on pump body and pump drive shaft
0.00062÷0.00240 in (0.016÷0.061 mm).
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4.13.6. REASSEMBLING THE OIL PUMP
• Reassemble the oil pump and fit it to the crankcase,with reference to the two centring grub screws.
• Tighten the Allen screws to the specified torque andcheck that the drive shaft runs freely.
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4.13.7. DISASSEMBLING THE OIL PRESSURE CONTROL VALVE
• Unscrew with the provided tool the control valve fromits threaded seat in the crankcase .
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4.13.8. REASSEMBLING THE OIL PRESSURE CONTROL VALVE
• Fit the valve and spring and tighten down the screw tothe specified torque with a torque wrench (use threadsealant on the screw threads).
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4.13.9. REASSEMBLING THE OIL TRANSMITTER
• Fit the oil sensor led transmitter to its connector andtighten to the specified torque.
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4.13.10. TIGHTENING TORQUES
Cylinder heads-barrels to crankcase fixing nut (M10) 29.50÷30.98 ftlbCylinder heads-barrels to crankcase fixing nut (M8) 20.65÷22.13ftlbCrankcases joining nuts (M8) 16.23÷18.44 ftlbCrankcases joining nuts (M10) 29.50÷30.98 ftlbTiming cover fixing screws 7.38 ftlbOil sump fixing screws 7.38 ftlbValves cover insert fixing screws 3.69 ftlb
CRANKCASE AND COVERS
Engine oil pressure sensor 5.90÷7.38 ftlbOil pump to crankcase fixing screws 7,38 ftlbFilter cartridge sealing cover fixing screw 18,44 ftlb
LUBRICATION
Moto Guzzi S.p.a.Via E.V. Parodi, 5723826 Mandello del Lario (LECCO) ItalyTel. +39 0341 709111Fax +39 0341 709220www.motoguzzi.itwww.servicemotoguzzi.com