Honda CBR929RR [274/488] Install a 45 degree finish cutter and cut the seat to

Honda CBR929RR [274/488] Install a 45 degree finish cutter and cut the seat to
The location of
the valve seat in
relation to the
valve face is very
important for
good sealing
.
Use a 32-degree cutter to remove the top 1/4 of the
existing valve seat material
.
Use a 60-degree cutter to remove the bottom 1/4 of
the old seat
.
Remove the cutter and inspect the area you have
refaced
.
Install a 45-degree finish cutter and cut the seat to
the proper width
.
Make sure that all pitting and irregularities are
removed
.
Refinish if necessary
.
Apply a thin coating of Prussian Blue to the valve
seat
.
Press the valve through the valve guide and onto
the seat to make a clear pattern
.
If the contact area is too high on the valve, the seat
must be lowered using a 32 degrees flat cutter
.
CYLINDER HEAD/VALVES
OLD SEAT WIDTH
32°
1
.0 mm (0
.04 in)
45°
CONTACT TOO HIGH
OLD SEAT
WIDTH
32°

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