2001-2005 Honda TRX250EX Sportrax TRX250EX Factory Service Manual, Page 101Get this manual
CYLINDER HEADVALVE REFACING NOTE: Follow the refacing manufact urer's operat ing instructionsBe careful not grind the seat more than necessary
If the contact area is too high on the valve, he seal
must be lowered using 32 fl at cutterTOOLS:
Flat cutter, 30 mm 132" IN) Flat cutter, 33 mm 132" EX)
077800012200 077800012900
or equivalent commercially available in U.S.A
If the contact area is too Iowan the valve, the seat
must be raised using 60 interior cunerTOOL: Interior cutter, 30 mm 160" INEX)
CONTACT TOO LOW
077800014000