Machines with chain brake
First remove chain sprocket cover and cutting attachment.
Take out spark plug. Pullout starter rope about
30
cm
(12
in)
and wrap
it
round the handlebar; this
is
necessary to
prevent the rope breaking away when the clutch
is
tightened.
Screw locking screw into
spark plug hole by hand. Use
combination wrench to unscrew hexagon nut and then take
off front guide washer. Now insert claws of clutch wrench
between clutch shoes and unscrew the clutch.
Caution: The hexagon nut and clutch spider have left-
hand threads
- unscrew clockwise.
After unscrewing the clutch, remove rear guide washer,
sprocket and needle bearing from the crankshaft
in
that
order.
Clean stub of crankshaft, wash out needle cage
in
clean
gasoline and lubricate with antifriction bearing grease.
Reverse the above sequence to fit the new
chain sprocket.
Position rear guide washer so that its raised edge faces the
crankcase. When fitting the clutch, make sure that the side
on
which the thread is drilled out about 2 mm (0.08 in) also
faces the crankcase. The raised inner diameter of the front
guide washer must fit against the clutch.
Before tightening the clutch, turn crankshaft counterclock-
wise until piston crown butts against the locking screw.
32 Release starter rope from handlebar at the same time.
Top: Starter rope wrapped round handlebar
Center: .Unscrewing hexagon nut
Bottom: Removing clutch
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