Measure the crankshaft runout.
Service Limit: 0.10mm replace if over
Measure the crankshaft bearing play.
Service Limits:
Axial : 0.20mm replace if over
Radial : 0.05mm replace if over
CRANKCASE ASSEMBLY
Clean off all gasket material from the
crankcase mating surfaces.
Install a new oil seal into the left crankcase.