- Preparations,
•
Unscrew cylinder base screws.
Note: The two screws at the back
are not visible.
- Draw cylinder off piston.
- Examine cylinder and replace if
necessary.
- The matching piston must al-
ways be fitted when installing a
new cylinder. New cylinders are
therefore only supplied with
piston.
- Before removing the piston, de-
cide whether the crankshaft must
also be removed. The crank-
shaft must be blocked by sliding
the wooden assembly block be-
tween the piston and crankcase
in order to remove the clutch and
starter carrier.
- Remove cylinder gasket.
•
Prise the hookless snap rings
out of the annular grooves.
•
Push piston pin (1) out of the
piston with assembly drift (2)
1114 893 4700.
Note: If the piston pin is stuck, it
can be loosened by lightly tap-
ping the assembly drift with a ham-
mer. The piston must be held
steady during this process to en-
sure that no jolts are transmitted to
the conrod.
- Remove piston from conrod and
draw needle cage out of small
end.
•
Check piston rings and replace if
necessary,
•
Thoroughly clean sealing area
(1).
•
Wet needle cage (2) with oil and
fit it in the small end.
•
Lightly heat piston to facilitate in-
stallation and slip it over the con-
rod.
•
Note installed position of piston:
1 = Marking
2 = Flywheel
•
Push assembly drift through
piston and small end (needle
cage) with the small diameter
first and line up the piston.
392RA033
VA
366RA066
VA
1
2
366RA068
1
2
VA
392RA034
1
2
VA
145RA080
VA
366RA067
VA
366RA070
VA
16
