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CRANKCASE AND CRANKSHAFT
a
INSPECTION
Crankshaft
1. Measure:
• Runout limit a
• Connecting rod big end side clearance b
• Connecting rod big end radial clearance
c
• Crank width d
Out of specification → Replace.
Use the dial gauge and a thickness
gauge.
Runout
limit
Side
0.10 ~ 0.40 mm
clearance
(0.0039 ~ 0.0157 in)
Radial
0.010 ~ 0.025 mm
clearance
(0.0004 ~ 0.0010 in)
Crack
42.95 ~ 43.00 mm
width
(1.691 ~ 1.693 in)
ASSEMBLY AND INSTALLATION
Crankcase
1. Apply:
• Sealant
On the left crankcase.
Yamaha bond No. 1215:
90890-85505
NOTE:
• Clean the contacting surface of crankcase
(left and right) before applying the sealant.
• DO NOT ALLOW any sealant to come in
contact with the oil gallery a.
4 - 53
ENG
Standard
Limit
0.03 mm
—
(0.0012 in)
0.50 mm
(0.02 in)
0.05 mm
(0.002 in)
—
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