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ASSEMBLY OF THE SUPERIOR PART OF THE ENGINE
CHECKING THE PISTON:
It must not be scratched or show traces of
breaking down.
The segments must be free in their seats.
CHECKING THE SEGMENTS: compression
segments and tight ones.
Cutting set new segment: 0.15 to 0.33 mm.
Limit of use: max. 1 mm.
Set in the hole: 0.03 to 0.06 mm.
CHECKING THE CYLINDER:
The cylinder must not have any scratches, show
traces of breaking down or show traces of
having worn out considerably.
Verify this with a comparer in two directions,
the first one perpendicular to the piston shaft,
the second one in parallel with its shaft
(measured between the head of the piston and
the exhaust hole). The allowed ovalization is
0.03 mm.
After this, measure the diameter of the piston
and compare it with the cylinder. The max. set
that is allowed is 0.07 mm.
ASSEMBLY OF THE PISTON:
Verify the parity of the whole cylinder/piston
(letter indicated on the piston and cylinder).
Oil and place the needle case at the stem of the
connecting rod.
Present the piston with the arrow directed
towards the exhaust pipe.
Push the bolt into its seat.
Incline the engine to one side to prevent the clip
from falling on the engine.
Assemble a new fixing clip (THIS IS
COMPULSARY!) with Pin.
REMEMBER: the opening of the clip must look
up or down, never to a side.
NOTE: as in all engines, we recommend
verifying the lining-up of the connecting rod in
the assembly.
ASSEMBLY OF THE CYLINDER:
Place de new base joint after oiling it.
Also oil the piston and the cylinder.
Make sure that the opening of the segments is in
position.
Introduce the cylinder compressing both
segments with your fingers.