1998-2001 Yamaha YFM600FHM Grizzly Factory Service Manual, Page 149Get this manual
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ROCKER ARMS
ROCKER ARM AND CAMSHAFT INSPECTION 1.1nspect: Camshaft bushings Damagewear -t Replace2.lnspect: Camshaft lobes G) Valve adjusters Blue discolorationpittingscratches -t Replace