Crankshaft Inspection - Yamaha SR125 1997 Service Manual

CRANKCASE AND CRANK SHAFT
4-54
T******

CRANKSHAFT INSPECTION

1. Measure:
: Crankshaft runout
Out of specification ! Replace crankshaft
and/or bearing.
NOTE:
Measure the crankshaft runout with the crank-
shaft assembly turning slowly.
Runout limit:
0.03 mm
2. Measure:
: Big end side clearance
Out of specification ! Replace big end bear-
ing, crank pin and/or connecting rod.
Big end side clearance:
0.35 0.65 mm
Limit
0.1 mm
3. Measure:
: Crank width
Out of specification ! Replace crankshaft.
Crank width:
55.95
4. Inspect:
: Timing chain sprocket 1
Wear/Damage ! Replace crankshaft.
: Bearing 2
Wear/Crack/Damage ! Replace crank-
shaft.
5. Inspect:
: Crankshaft journal
Clogged ! Blow out the journal with com-
pressed air.
ENG
56.00 mm