Distribution: Operating Sales Accessory Parts. Service Set-Up BMW NA Manager Manager Manager Manager Manager WorkshopBulletin Date: 11/11/98 Main Group: 00 For USA OnlyBulletin #2850 Maintenance & General Hints

Please initial and route to the following before filingService Parts Sales Warranty Tech #1 Tech #2 Tech #3 Tech #4

SI2850

BMW MotorcyclesService Bulletin

Modification to Brake: The bleed screw at the rightfront brake caliper has beendeleted.

A filling point with check valve isnow installed rather than thebleeder screw.

Modification to Clutch: The bleed screw on the clutchbleed hose is deleted.

A filling point with check valve isnow installed rather than thebleeder screw.

Reason: The front brake and clutch hydraulic lines are now being filled atthe Berlin factory with a new filling system, which is connected tothe new filling points.

Introduction: Filling points (PN 32 72 2 333 158) have been installed on allmodels after the 1998 production break.

Fluid Renewal / BleedingProcedure:

• A bleed screw (PN 34 21 2330 310) will be needed tocomplete this task.

Special Tool Note:It is recommended that alltechnicians obtain one bleedscrew and keep it as a specialtool in their tool box.

Subject: Modification to Front Brake and Clutch Systems

Subject: Modification to Front Brake and Clutch System Page 2

SI2850

Fluid Renewal / BleedingProcedure:

Note: The filling point (1)check valve functions suchthat it is closed when thebleed screw (3) is screwedall the way in or all the wayout. In between, fluidflows freely.

• Take the Allen set screw (2)out of the filling point (1).

• Connect your workshop

brake bleeding device to thebleed screw (3) prior tothreading it into the fillingpoint.

• With the brake bleeding

device attached, tighten thebleed screw (3) fully by handat the filling point (1) so thatthe check valve is closed.

• Open bleeding screw (3)

again by ½ turn (check valveopen).

• Draw off brake fluid until it

emerges clear and free fromair bubbles.

• Unscrew bleed screw (3)

from filling point (1) anddetach the brake bleedingdevice from the bleed screw(3).

• Using a “Q-Tip”, remove any

excess brake fluid sitting inthreads of the filling point (1).

• Insert Allen set screw (2) into

the filling point (1) and tightento a torque of 10 Nm.

Caution: Protect paintedareas around filling point (1)from brake fluid drips whilebleeding, by surrounding thefilling point (1) with shoptowels.

Caution: As the bleed screw(3) is tightened, the valve inthe filling point (1) opens andbrake fluid flows outimmediately. The brakebleeding device must beconnected to the bleed screwbefore it is threaded into thefilling point.

Warning: The motorcyclemust never be ridden withoutthe Allen set screw insertedand tightened at the fillingpoint!