Honda 1998 VT750C Service Manual page 210

CYLINDER HEAD/VALVES
OLD SEAT
WIDTH
~.
-----'
CONTACT TOO HIGH
If the contact area is too low on the valve, the seat
must be raised using a 60° inner cutter. Refinish the
seat to specifications, using a 45° finish cutter.
If the contact area is too high on the valve, the seat
must be lowered using a 32° flat cutter.
CONTACT TOO LOW
~.
_ _ _----I
Using a 45° cutter, remove any roughness or irregu-
larities from the seat.
ROUGHNESS
Using a 32° cutter, remove 1/4 of the existing valve
seat material.
OLD SEAT WIDTH
Using a 60° cutter, remove the bottom 1/4 of the old
seat.
OLD SEAT WIDTH
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