Technical data

116
REFITTING THE PISTON RINGS
Sealing ring assembly
- Place the scraper ring spring on the piston.
- Install the scraper ring keeping the opening opposed to the
spring junction and with the writing “top” facing upwards.
In any case, the chamfering must be arranged towards the
piston top.
- Fit the 2nd sealing lining with the identification letter or the
writing “top” facing the piston top. In any case, the step must
be facing opposite the piston top.
- Fit the first sealing lining with the top writing or the referen-
ce facing the piston top.
- Misalign the lining openings at 120° as shown in the figure.
- Lubricate the parts with engine oil.
- The engine 250 uses the first compression lining with an L
section.
N.B.
THE 2 SEALING LININGS HAVE A CONICAL SURFACE OF
CONTACT WITH THE CYLINDER. THIS IS TO ENSURE A BETTER
ADAPTATION.
REFITTING THE CYLINDER
- Fit the cylinder base gasket with the previously determined
thickness.
- Using the fork support and the piston ring retaining band,
install the cylinder as shown in the figure.
N.B.
BEFORE INSTALLING THE CYLINDER, CAREFULLY BLOW THE
LUBRICATION DUCT AND LUBRICATE THE CYLINDER LINER.
Specific tooling
020426Y Piston fitting fork
020393Y Piston band clamps (Engine 200 - 250 cc)
020287Y Piston band clamps (Engine 125cc)
REFITTING THE PISTON RINGS
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