Checking The Crankshaft And Connecting Rod - Yamaha TW125 1999 Service Manual

CRANKSHAFT
EAS00394
CHECKING THE CRANKSHAFT AND CON-
NECTING ROD
1. Measure:
S crankshaft runout
Out of specification ! Replace the crank-
shaft, bearing or both.
NOTE:
Turn the crankshaft slowly.
Crankshaft runout
Less than 0.03 mm
2. Measure:
S big end axial clearance
Out of specification ! Replace the big end
bearing, crankshaft pin, or connecting rod.
Big end axial clearance
0.35 X 0.65 mm
Limit 1.0 mm
3. Measure:
S crankshaft width
Out of specification ! Replace the crank-
shaft.
Crankshaft width
55.95 X 56.00 mm
4. Check:
S crankshaft sprocket 1
Damage/wear ! Replace the crankshaft.
S bearing 2
Cracks/damage/wear
crankshaft.
5. Check:
S crankshaft journal
Scratches/wear ! Replace the crankshaft.
S crankshaft journal oil passage
Obstruction ! Blow out with compressed air.
4-60
ENG
!
Replace the