Technical data

112
N.B.
BEFORE REPLACING THE LININGS, MAKE SURE THAT THE PRES-
CRIPTIONS RELATING TO THE SEALING RING - HOUSINGS
AND PISTON - CYLINDER COUPLING CLEARANCES ARE RES-
PECTED. IN ANY CASE, NEW SEALING RINGS COUPLED WITH
A SECOND-HAND CYLINDER MAY REQUIRE ADJUSTMENT
CONDITIONS DIFFERENT FROM STANDARD ONES.
Characteristic
1st lining
Standard opening:
0,15 ÷ 0,30 mm
2nd lining
Standard opening:
0,20 ÷ 0,40 mm
Scraper ring
Standard opening:
0,20 ÷ 0,40 mm
REMOVING THE PISTON
- Refit piston and wrist pin on connecting rod with the arrow
stamped on the piston crown pointing towards the exhaust.
- Position the wrist pin spring clip on the special tool.
- With the opening in the position shown on the tool.
S = Left
D = Right
- Correctly position the clip using the drift.
- Install the clip using the drift as shown in the figure.
N.B.
THE TOOL FOR INSTALLING THE LOCKING RINGS MUST BE
USED MANUALLY.
CAUTION
USING A HAMMER MAY DAMAGE THE LOCK HOUSINGS
Specific tooling
020454Y Pin retainers installation tool
020430Y Pin retainers installation tool (Engine 125cc)
OG SO