PIAGGIO 500 cc Service Manual page 103

Driving shaft crankcase
- Check the connecting rod diametral play.
Standard play: 0.046 - 0.076 mm
- Check that the end play containment surfaces show
no signs of scoring. Measure the driving shaft width
by means of a gauge, as shown in the figure.
N.B.: Check that the measuring is not distorted by the
driving shaft support radius.
Standard dimensions: 63.6 - 63.45 mm
Warning
- The driving shaft can be reused when
the width conforms to the standard values and the
surfaces show no signs of scoring.
Shim
- Check the total dimension of the driving shaft-shoul-
der-gear assembly.
Standard thickness: 71.804 - 72.000 mm
- Make sure that the shim is not scored.
N.B.: If reused, maintain the original assembly position.
Specific tool:
Support for driving shaft control
- If the driving shaft-crankcase end play exceeds the
standard values but the driving shaft is not damaged,
the trouble is certainly due to the wear or wrong
machining of the engine crankcase.
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