Valve Seat Inspection/Refacing - Honda 1985 CBX750F Workshop Manual

~·HONDA
CYLINDER HEAD/VALVES
~
CBX7S0F
VALVE SEAT INSPECTION/
REFACING
Clean all intake and exhaust valves thoroughly to
remove carbon deposits.
Apply a light coating of valve lapping compound
to each valve face. Lap each valve and seat a few
times with light pressure using a rubber hose or
other hand·lapping tool.
NOTE:
Take care not to allow the compound to enter
between the valve stem and guide. After lapp­
ing, wash out the compound completely and
apply a coat of engine oil to the valve face and
seat.
Remove the valve and inspect the face.
CAUTION
The valves cannot be ground-.
lf
the valve face
is rough, worn unevenly, or contacts the seat
improperly, the valve must be replaced.
Inspect the valve seat. If the seat is too wide, too
narrow, or has low spots, the seat must be ground.
NOTE:
Follow the refacer manufacturer's operating
instructions.
(1)
SEAT WIDTH :
0.9-1.1 mm
(0.035-0.043 in)
(2)
SERVICE LIMIT:
1.5 mm (0.06 in)
After cutting the seat, apply lapping compound to
valve face, and lap the valve using light pressure .
After lapping, wash any res idual compound off the
cylinder head and valve.
(2) CUTTER HOLDER
No.
07781-0010400
(3)
FLAT CUTTER:
IN 07780-0012100
EX 07780-0012000
\
(1)
OLD SEAT
~IDTH
\
\
\
60~
(4)
INTERA CUTTER:
IN
07780-0014500
EX 07780-0014202
(5)
SEAT CUTTER :
IN 07780-0010200
EX 07780-0010100
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