If
puller is not available: Screw flywheel nut flush with,
end of crankshaft to protect shaft threads from being
damaged. Place the end of a large screwdriver be-
B
tween the crankcase and flywheel in line with the
keyway. Strike the end of the flywheel nut with a bab-
bitt hammer and at the same time wedge outward
with the screwdriver.
CAUTION:
During reassembly
DO
NOT drive
flywheel onto taper of crankshaft and
DO
NOT
overtighten flywheel nut.
A
3.
In reassembly, install key in crankshaft. Torque
flywheel nut to specifications (see ‘SPECI-
FICATIONS).
Ignition Coil
Figure
8-4
Remove spark plug cap from high tension cable of
ignition coil and remove ignition coil from
crankcase.
During reassembly adjust flywheel-to-ignition coil air
gap to specification (see ‘SPECIFICATIONS).
Cylinder Head and Spark Plug
1.
Remove blower guide, if equipped.
2.
Remove spark plug from cylinder head.
3.
Remove bolts to remove cylinder head and
gasket.
0
4.
Clean carbon from combustion chamber and dirt
-
from between the cooling fins. Check the cylin-
der head mounting face for distortion.
If
distor-
tion is greater than specification (see ‘SPECI-
FICATIONS), replace head.
5.
In reassembly use new cylinder head gasket.
Torque bolts to specification (see
‘SPECI-
FICATIONS).
NOTE:
Do
not install spark plug at this time. This will
ease in turning engine over for remainder of
assembly. When installing spark plug, torque
to specification (see ‘SPECIFICATIONS).
Intake and Exhaust Valves
Figures
8.5
-
8-7
1.
Position engine with piston facing up.
2.
Remove the cylinder head and gasket from cylin-
der case.
3.
Refer to Figures
8-5
and
8-6.
Remove rocker
shaft and rocker arm. Push down on spring and
pull retainer to position valve stem in retainer
key hole. Remove spring and retainer. Remove
valve from cylinder head.
4.
Clean carbon and gum deposits from the valves,
seats, ports and guides. Inspect valves, valve
seats and valve guides.
-
Figure
8-5.
ROCKER
SHA
Replace valves that are badly burned, pitted or
warped.
UP
FRONT
/
J
Figure
8-6.
8-3
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