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Page 1: SERVICE AND REPAIR MANUAL - Scootertronicssite.scootertronics.com/139QMB.pdf(FOFSBM *OGPSNBUJPO 1SPEVDU 4QFDJmDBUJPOT BOE 5FDIOJDBM %BUB 4DPPUFS .PEFM JL50QT-18 JL50QT-X1/8 JL50QT-14-FOHUI

4 STROKE ENGINE

SERVICE AND REPAIR MANUAL

PDF processed with CutePDF evaluation edition www.CutePDF.com

Page 2: SERVICE AND REPAIR MANUAL - Scootertronicssite.scootertronics.com/139QMB.pdf(FOFSBM *OGPSNBUJPO 1SPEVDU 4QFDJmDBUJPOT BOE 5FDIOJDBM %BUB 4DPPUFS .PEFM JL50QT-18 JL50QT-X1/8 JL50QT-14-FOHUI
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JL50QT-18

JL50QT-X1/8

JL50QT-14

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7

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AIR INLET TUBE

AIR SCREW

2

3

IDLING SPEEDADJUSTMENT SCREW

3

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60•

45•

CORSE SURFACE

IN, EX: (30mm)

IN, EX: (32mm)

IN: (24.5mm)

EX: (27.5mm)

32•

VALVE SEAT SURFACE WIDTH

VALVE SEAT SURFACE WIDTH

32•

60•

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