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CRANKCASE, CRANKSHAFT AND BALANCER
Crankcase
1. Inspect:
Contacting surface a
Scratches → Replace.
Engine mounting boss b, crankcase
Cracks/damage → Replace.
2. Inspect:
Bearing
Rotate inner race with a finger.
Rough spot/seizure → Replace.
Crankshaft
1. Measure:
Runout limit a
Connecting rod big end side clearance
b
Crank width c
Out of specification → Replace.
Use the dial gauge and a thickness
gauge.
Dial gauge and stand:
YU-03097/90890-01252
Runout
limit:
Side clear-
0.15 ~ 0.45 mm
ance:
(0.0059 ~ 0.0177 in)
Crack
46.95 ~ 47.00 mm
width:
(1.848 ~ 1.850 in)
4 - 69
ENG
Standard
<Limit>
0.03 mm
—
(0.0012 in)
0.50 mm
(0.02 in)
—
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