1995-2000 Honda FourTrax 300 300FW TRX300 TRX300FW TRX service manual., Page 81Get this manual
CYLINDER HEADNAlVES INSPECTION CYUNDER HEAD
Ren'IoY9 carbon depo6Irs lrom the combustion chamllet
Ched the spark plug hoie wid valvo aroas IOf cracks Chedc the Il6Bd IOf warpago with straoght odge wid 10:N1ler 11"SERVICE UMIT: 0.10 mm (0.004 Inl
Chock tho cam chain guide !or oXcesaivo woar or damage
VALVE SPRING FREE LENGTH
Meas.uro the lree Iongth oj the loner afld OUler vaivfl spOOgs,