Honda VTR1000F Service Manual page 139

Using a 60
0
interior cutter, remove 1/4 of the
existing valve seat material.
TOOLS:
Interior cutter, 37.5 mm
Cutter holder, 6 mm
077 80-0014100
07VMH-MBB0100
Using a 45
0
seat cutter, cut the seat to the proper
width.
After cutting the seat, apply lapping compound to
the valve face, and lap the valve using light pres-
sure.
CAUTION:
• Excessive lapping pressure may deform or dam-
age the seat.
• Change the angle of lapping tool frequently to
prevent uneven seat wear.
• Do not allow lapping compound to enter the
guides.
After lapping, wash any residual compound off the
cylinder head and valve and recheck the seat con-
tact.
CYLINDER HEAD/VALVE
OLD SEAT WIDTH
8-15