Checking The Crankshaft And Connecting Rod - Yamaha YP250R 2005 Service Manual

CRANKSHAFT
EAS00394
CHECKING THE CRANKSHAFT AND
CONNECTING ROD
1. Measure:
• crankshaft runout
Out of specification → Replace the crank-
shaft.
NOTE:
Turn the crankshaft slowly.
Crankshaft runout
0.030 mm (0.0012 in)
2. Measure:
• big end side clearance
Out of specification → Replace the crank-
shaft.
Big end side clearance
0.350 ~ 0.850 mm
(0.0138 ~ 0.0335 in)
3. Measure:
• crankshaft width
Out of specification → Replace the crank-
shaft.
Crankshaft width
59.75 ~ 59.80 mm
(2.352 ~ 2.354 in)
4. Check:
• crankshaft sprocket 1
Damage/wear → Replace the crankshaft.
• bearing 2
Cracks/damage/wear → Replace the crank-
shaft.
• oil pump drive gear 3
Damage/wear → Replace the crankshaft.
5 - 67
ENG