2005-2006 Honda ATV TRX500FE/FM/TM FourTrax Foreman Factory Service Manual, Page 140Get this manual
CYLINDER HEADVALVE REFACING Follow the refacing manufacturer's operating instructions
Valve seat cuttersgrinders or equivalent valve seat refacing equipment are recommended to correct worn valve seats
If the contact area is too high on the valve, the seat must be lowered using 32 flat cutterIf the contact area is too low on the valve, the seat must be raised using 60 interior cutter
CONTACT TOO HIGH
OLDSEAT WIDTH
CONTACT TOO LOW
OLDSEAT WIDTH
Reface the seat Using 45 seat cutter, remove any roughness or with 45cutter irregularities from the seatwhenever valve guide is replacedTOOLS: