Removing the piston
- Install piston and wrist pin onto the connecting
rod, aligning the piston arrow the arrow facing to-
wards the exhaust.
- Fit the wrist pin stop ring onto the appropriate tool
- With opening in the position indicated on the tool
S = left
D= right
- Place the wrist pin stop ring into position using a
punch
- Fit the wrist pin stop using the plug as shown in
the figure
N.B.
THE TOOL FOR INSTALLING THE STOP RINGS MUST BE
USED MANUALLY.
CAUTION
USING A HAMMER MIGHT DAMAGE THE STOPS' HOUS-
ING.
Specific tooling
020454Y Tool for fitting piston pin stops (200 -
250)
Choosing the gasket
Characteristic
Compression ratio, 125 models
Cr: 11.50 ÷ 13:1
Engine B 125-250
ENG - 150
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