Specifications

3
46
ASSEMBLING AND TESTING THE ENGINE
ASSEMBLING THE PISTON,
PISTON RING, PISTON PIN,
CRANK CASE/CYLINDER GASKET
AND CYLINDER
Insert a circlip to retain the piston pin in one of
the housings on the sides of the piston by pla-
cing the open part of the seeger towards the top
or the bottom.
Oil the piston pin and insert in the piston; then
couple the piston pin with piston on the oppo-
site side of the circlip, leaving enough space to
allow the connecting rod to be couple with the
piston.
Insert the roller cage into the connecting rod,
place the piston with the arrow facing to the
exhaust side .
Insert the second circlip.
Insert the cylinder base gasket on the cylin-
der and crank cases. The rubber lip A must
be facing the crank cases.
To have the correct gasket thickness, read
the 3.12.1 par.
First We suggest to use a new gasket with
the same thickness as the old one.
Heavily oil the piston with motor oil, then
insert the piston rings, the edges of which
must face the stop-pin area. The 125cc
my’11, 200cc, 250cc, 290cc piston rings,
have a letter marked on one side, which will
be applied facing the top piston.
3.12
Positioning the piston rings onto the piston.
OK NO!
Detail of the paper seal that is to be mounted
between the base unit and the cylinder.
A
The letter marked on the piston rings.