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III ENGINE
1. Removing engine from frame
a) Remove the engine guards.
b) Detach the spark plug cable, the fuel hose, and
the throttle cable.
c) Disconnect the leads of the electrical
equipment.
d) Disconnect the chain of the secondary
transmission.
e) Disconnect the exhaust pipe from the engine.
f) Remove screws fastening the engine to the
frame, and lift off the engine.
Clean well the surfaces of the engine, and drain the
oil from the automatic transmission case. During
engine dismantling, clean immediately all the
removed parts and put them aside in the order of
their removal, so that they can be reassembled
correctly and in the shortest possible time.
2. Removing cylinder head, cylinder and piston
a) Unscrew the four M6 nuts and lift them off
together with washers from the studs.
b) Remove the cylinder head.
c) Remove the cylinder (Fig. 5)
d) Remove the circlips securing the gudgeon pin
and use the drift No. 50-12000-1.1 (Fig. 6) to
drive out the gudgeon pin.
Take care not to spill the dia.. 2 x 8 mm. Needle
rollers of the gudgeon pin (there are altogether
twenty five). The maximum permissible ring gap of
a worn piston ring is from 0.6 mm to 0.8 mm.
Check the dimension for grading the pistons in the
individual classes 34.5 mm. From the piston base
(Fig. 7)
ZVL model 210 Workshop Manual Page 10 jkw
