2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 112Get this manual
CYLINDER HEADVALVES Remove the camshaft bellring sto pper plate
INSPECTIONREPLACEMENT
Measure each cam lobe's height end inspect it lor
wear or damageSERVICE LIMITS; IN: 35.57 mm 11 .4004 in) EX: 35.584 mm 11 .4009 in)
Turn each bearing outer race ilh your fingerThe bearings should lurn smoothly and quietlyA lso make sure the bearing inner race fits ightly onlo the camshaftRem ove end discard both bearings if eil her fll ce does not turn smoothly, quietly, or if they fit loosely on the camshaft