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section
N 5
106 1098/1098S - M.Y. 2007 - edition 00
Engine
Overhauling the gudgeon pins
Gudgeon pins must be perfectly smooth without signs of scoring, steps, or blueing due to overheating. The well-lubricated
gudgeon pin must slide smoothly inside the piston without stiffness.
The assembly clearance with the piston at the time of installation must be 0.002 to 0.008 mm.
The maximum permissible wear limit is 0.035 mm.
If a new gudgeon pin is fitted, you must also change the connecting rod small end bush.
Overhauling the piston rings
The piston rings must not show any signs of scuffing or scoring. Replacement pistons are supplied complete with piston rings
and gudgeon pin.
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