2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 132Get this manual

2008 Yamaha Raptor 250SE / 250SE2 Factory Service Manual, Page 132

ROCKER ARM, CAMSHAFT

CHECKING THE CAMSHAFT 1Check: Bearing DamagewearReplace2Check: Camshaft lobes Blue discolorationpittingscratches Replace the camshaft"