Crankshaft Inspection - Sym JET 4 R 50 Series Service Manual

10. Crankcase/Crankshaft

Crankshaft Inspection

Measure the clearance of connecting rod big end.
Measure the radial clearance of connecting rod
big end at X-Y directions as diagram show.
Place the crankshaft on a V-block, measure
run-out points A and B of the crankshaft with dial
gauge.
B
A
70mm
37mm
Check the crankshaft bearing by means of turning
Clearance
it with hand. If any noise and bigger clearance
are detected, replace the bearing with new one.
Clearance
Lateral Radial
10-4