1997 Yamaha YFM600FWAK ATV Service Manual, Page 123Get this manual
CAMSHAFT AND CYLINDER HEAD ENG
CAMSHAFT INSPECTION 1.lnspect: Cam lobes Pittingscratchesblue discoloration Replace2.Measure: Cam lobes length and (6)Out of specification -7 Replace
Camshaft lobe limit: Intake 36.37 mm (1.433 in) (6) 29.96 mm (1.180 in) Exhaust: 36.52 mm (1.438 in) (6) 30.01 mm (1.181 in)
CAMSHAFT SPROCKET INSPECTION 1.lnspect: Camshaft sprocket Weardamage -7 Replace the camshaft sprocket and timing chain as set