ENGINE
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1、CHECK
1). Checking the pinion gears
• gear teeth (drive pinion gear) ①
• gear teeth (driven pinion gear) ②
Pitting/galling/wear
Replace.
• O-ring
Damage
Replace.
• bearings
Pitting/damage
Replace.
• universal joint movement
Roughness
Replace universal joint.
2). Selecting the middle drive and driven gear
shims
When the drive and driven gear, bearing
housing assembly and/or crankcase replaced,
be sure to adjust the gear shims ① and ②.
• middle drive gear shim ①
• middle driven gear shim ②
2、MEASURE
• gear lash
Middle gear lash
0.1 ~ 0.3 mm
a. Temporary install the left crankcase.
b. Wrap a rag ① around a screwdriver ②, and
then insert it into the installation hole ③ of the
right crankcase speed sensor to hold the
middle driven gear.
c. Attach the gear lash measurement tool ④
and dial gauge ⑤.
a)6.7 mm (0.26 in)
d. Measure the gear lash while rotating the
middle driven shaft back and forth.
1NOTE:
Measure the gear lash at 4 positions. Rotate
the middle driven gear 90° each time.
If the gear lash is incorrect, adjust the gear
lash by middle driven pinion gear shims
and/or middle drive pinion gear shim(s).
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