Crankshaft Inspection - Sym PA12B Service Manual

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9. Crankshaft / Crankcase / Transmission / Kick Starter

Crankshaft Inspection

Use a feeler gauge to measure left and right
clearance of connecting rod big end.
Service limit：0.6mm
Measure the clearance of the big end at the
vertical directions.
Service limit：0.05 mm
Place the crankshaft on a V-block.
Measure the crankshaft run-out.
Service limit：0.10 mm
Clearance
Crankshaft bearing inspection
Rotate the bearings on the left and right
Clearance
crankcase to check if the bearings rotate
smoothly and silently.
Check if the outer ring of the bearing fixes on
the crankcase firmly or not.
The bearing must be replaced if there is
excessive noise or roughness.
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