57MS 441, MS 441 C
: Install the piston rings so that the
ground radii at the ring gap meet
at the fixing pin in the piston
groove (arrows).
: Ensure that the piston rings are
positioned correctly (arrows).
219RA164 TG
– Install piston, b 8.7.
– Reassemble all other parts in the
reverse sequence.
– Remove shroud, b 8.4.
: Unscrew decompression
valve (1).
1
219RA363 TG
: Examine sealing cone (arrow) on
decompression valve for signs of
damage.
The decompression valve must be
replaced if the sealing cone on the
decompression valve does not
close completely or is damaged.
– Fit decompression valve and
screw in by hand.
– Tighten down decompression
valve.
– Tightening torques, b 3.5.
– Reassemble all other parts in the
reverse sequence.
Great care must be taken when
looking for faults and when carrying
out maintenance and repair work on
the ignition system. The high
voltages encountered can cause
serious or even fatal accidents.
Troubleshooting on the ignition
system should always start with the
spark plug, b 4.5.
– Remove fan housing,
b 10.2.
The electronic breakerless ignition
system essentially comprises the
ignition module (1) and flywheel (2).
219RA364 TG
2 1
8.9 Decompression valve 9. Ignition system
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