17
WORKSHOP MANUAL
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Take off the outer cover sprocket, loosen
the gear nut and unscrew with nr.32 socket
spanner. Pull out the sprocket with inner
cover from mounting.
It is not necessary to uncouple the chain.
Remove the right footrest, bolts and pins
holding engine into the frame. Standing on
the right side grip the engine with right
hand by the cylinder and with left hand by
the start lever (see pic.) Lift the engine
slightly to the front, shift it to the right and
take it out of the frame. Avoid damaging
the paint – protect frame pipes (e.g. by
rubber tubes).
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D
D
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M
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U
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T
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G
G
A
A
N
N
D
D
M
M
O
O
U
U
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N
T
T
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G
G
T
T
H
H
E
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2.1. Basic disassembly
Clamp the engine front section between vice jaws
in such a way, that the engine left side is accesible.
Remove the carburettor, primary gear, cylinder heads
and pistons. Drive the rear centring element from the left
side of engine housing to the right side. Take out the
clutch automatic release device and remove M6 bolts
holding two halves of engine housing together. Take the
housing out of the vice and lay it down on the left side.
2.2.
Separating two halves of engine
Bolt the S-90 puller in the M6 thread holes in the
housing (see pic). and strip with it uniformly the
right half of the housing from the crank
mechanism bearing. Take care to keep the right
connecting rod in the top dead end position, it has
to pass easily through the central housing slit. If
during the stripping the right half of housing gets
jammed, knock with caution on the rear poart of
housing event. turn a bit shaft of sprocket to keep
stripping procces uniform. After two halves are
separated enough remove the mid insert between
two cylinders – to allow free passage of
connecting rod. Finish separating and remove the
right half.