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ENGINE
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1
、
CHECK
1). Checking the middle drive
• O ring
Damage
Replace.
• earings
Clean an lu ricate then rotate the inner race
with a finger.
Pitting/damage
Replace.
• uni ersal oint mo ement
Roughness
Replace uni ersal oint.
. Checking the crankcase
Thoroughly wash the case hal es in a mil
sol ent.
Clean all the gasket mating surfaces an
crankcase mating surfaces thoroughly
(3) heck:
• crankcase
Cracks amage
Replace.
• oil eli ery passages
Clogge
Blow out with compresse air.
2
、
MEASURE
. Measure the crankshaft
• crank wi th A
Out of specification
Replace the crankshaft.
Crank width
90.52 ~ 90.58 mm
• si e clearance D
Out of specification
Replace the crankshaft
Big end side clearance
Limit: 1.0 mm (0.0384 in)
• runout
C
Out of specification
Replace the crankshaft.
Runout limit
(b): 0.03 mm
0.0012 in
(C): 0.03 mm
0.0012 in
The crankshaft
①
and the crank pin
②
oil
passages must e properly interconnecte with
ENGINE
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a tolerance of less than 1 mm (0.04 in).
CAUTION:
The buffer boss and woodruff key should be
replaced when removed from the crankshaft.
2). Assembling the crankcase
(1) Apply:
• sealant uick Gasket
to the mating surfaces of oth case hal es
(2) Install:
• owel pins
(3) Fit the left crankcase onto the right case. Tap
lightly on the case with a soft hammer
CAUTION:
Before installing and torque the crankcase
holding bolts, be sure to check whether the
transmission is functioning properly by
manually rotating the shift drum in both
directions.
(4)Tighten:
• crankcase olts
follow the proper tightening se uence
NOTE
• ighten the bolts in stages using a crises
cross pattern.
3
、
INSTALL
1). Installing the crankshaft
• crankshaft
NOTE
Hold the connecting rod at the Top Dead
Center (TDC) with one hand while turning the
nut of the installing tool with the other.
Operate the installing tool until the
crankshaft bottoms against the bearing.
