1982-1983 Official Honda ATC 200E Big Red Shop Manual, Page 66Get this manual
CYLINDER HEAD VALVES Use 45 degree cutter to remove any roughness or irregularities from the seat
ATC200E
Reface the seat with 45 degree cutter when the valve guide is repla ced Use 32 degree cutter to remove 1 of the existing valve seat materia l
Use 60 degree cutter to remove the lower 1 of the old seatRemove the cutter and inspect the area you have just cut