1997-2004 Honda Fourtrax Recon TRX250TE/TM Service Manual, Page 125Get this manual
CYLINDER HEADCYLINDERPISTON Use 32-degree cutter to remove the top 14 of the
existing valve seat materialOLD SEAT WIDTH
Use 50-degree cutter to remove the bottom 14 of
the old seatRemove the cutter and inspect the area you have
refaced
OLD SEAT WIDTH
Install 45-degree finish cutter and cut the seat to the proper widthMake sure that all pitting and irregularities are