Cylinder Head Assembly - Honda Motorcycle Service Manual

CYLINDER HEAD
After cutting the seat, apply lapping compound to the valve
face, and lap the valve using light pressure.
CAUTION
-
Excessive lapping pressure may deform or damage the
seat.
Change the angle of lapping tool frequently to prevent
uneven seat wear.
.
Lapping compound can cause damage if it enters be-
tween the valve stem and guide.
After lapping, wash any residual compound off the cylinder
head and valve.
Recheck the seat contact after lapping
CYLINDER HEAD ASSEMBLY
install new stem seals
NOTE
.
Replace the stem seals with new ones whenever a stem
seal is removed.
Lubricate each valve stem with molybdenum dusulfide grease
and insert the valve into the valve guide while slowly turning
the valve.
CAUTION
.
To avoid damage t o the stem seals, turn each valve
w h e n insertina.
Install the spring seats, valve springs and retainers
MATF
,.-.-
a
If the valve springs have a varying pitch, install the
swings with the narrow pitch end facing down.
MOVE THE
VALVE UP AND
DOWN WHILE
ROTATE
TAEVALVE
AND PRESS LIGHTLY
/
VALVE SPRING COMPRESSOR
,
STEM
Compress the valve springs with the valve spring compressor
and install the valve cotters.
CAUTION
+
Compressing the valve spring more than necessary
when installing the valve cotters may cause loss of valve
spring tension.
NOTE
TO ease installation of the cotters, grease them first.
Tap the valve stems gently with a soft hammer to firmly seat
the cotters.
9-1 8
Date of Issue : March, 1995
0
HONDA MOTOR CO..LTD.