Honda CB 600F Hornet 2007 Shop Manual page 269

CYLINDER HEAD/VALVES
VALVE SEAT REFACING
Valve seat cutters/grinders or equivalent valve seat
Follow the refacing
refacing equipment are recommended to correct
manufacturer's
worn va Ive seats.
operating
instructions.
If the contact area is too high on the valve, the seat
must be lowered using a 32-degree flat cutter.
If the contact area is too low on the valve, the seat
must be raised using a 60-degree interior cutter.
Use a 45-degree cutter to remove any roughness or
Reface the seat
irregularities from the seat.
wirh � 45-<fogroo
cutcer whenever a
TOOLS:
valve guide is
Seat cutter, 29 mm (IN)
replaced.
Seat cutter, 24 mm (EX)
Cutter holder, 4.0 mm
Use a 32-degree cutter to remove the top 1/4 of the
existing valve seat material.
TOOLS:
Flat cutter, 29 mm (IN)
Flat cutter, 24 mm (EX)
Cutter holder, 4.0 mm
8-20
CONTACT TOO HIGH
CONTACT TOO LOW
07780-0010300
07780-0010600
07781-0010500 or
equivalent commer­
cially available
07780-0013400
07780-0012500
07781-0010500 or
equivalent commer­
cially available
\
°
'- 32
r
OLD SEAT WIDTH
OLD SEAT WIDTH
�-�-
f_
32 °
60 °