Honda CB 600F Hornet 2007 Shop Manual page 268

VALVE SEAT INSPECTION/REFACING
Clean the intake and exhaust valves thoroughly to
remove carbon deposits.
Apply a light coating of Prussian Blue to the valve
seats.
Tap the valves and seats using a rubber hose or
other hand-lapping tool.
Remove the valve and inspect the valve seat face.
The valve seat contact should be within the speci­
fied width and even all around the circumference.
STANDARD:
IN/EX: 0.90 - 1.10 mm (0.035 - 0.043 in)
SERVICE LIMIT:
IN/EX: 1.5 mm (0.06 in)
If the seat width is not within specification, reface
the valve seat (page 8-20).
Inspect the valve seat face for:
• Uneven seat width:
- Replace the valve and reface the valve seat.
• Damaged face:
- Replace the valve and reface the valve seat.
• Contact area (too high or too low)
The valves cannot
- Reface the valve seat.
be ground. a
If
valve face 1s burned
or badly worn or if
11
contacts the seat
unevenly. replace
rhe valve.
CYLINDER HEAD/VALVES
t
SEAT WIDTH
UNEVEN SEAT WIDTH
DAMAGED FACE
TOO LOW
Jf
TOO HIGH
8-19