Cylinder Head Assembly - Honda CH250 Elite 1986 Service Manual

CYLINDER HEAD/VALVES
NOTE
TOO HIGH
• The location of the valve seat in relation to the valve face is
very for good and maximum valve ser-
vice.
a thin
f:OI'ltlr,a
of Prussian Blue to the valve seat.
Press the valve the valve and onto the seat to
make a clear pattern.
Remove to inspect the valve.
If the contact area too on the valve, the seat must he low-
ered a 32 flat cutter.
Refinish the seat to the correct width using a 45 degree finish
cutter.
If the contact area is too Iowan the valve, the seat must be
raised a
60
inner cutter. Refinish the seat to the
correct width, a 45 degree finish cutter.
After the seat, apply to the valve
face, and the valve using pressure. After lapping,
wash all residual compound off the cvlinejer head, valve, and
r'n,,,, ''''
T
TOO LOW
WIDTH
(5)
COTTERS
.A
i!i;'
(3) OUTER
SPRING
(4) SPRING
RETAINER
/ ) '
(7) SPRING SEAT (6) INNER SPRING
Lubricate each valve stem with oil, then insert the valves into
the valve guides.
Install new valve stem seals.
Install the valve spring seat, springs and retainers.
The springs tightly wound coils should face in toward the
combustion chamber.
CYLINDER HEAD ASSEMBLY
The tightly would coils should face in toward the
combustion chamber.
the valve using the valve
compressor, then install the valve cotters.
CAUTION
• To prevent loss tension, do not compress the valve spring
more than necessary.
6-11