PIAGGIO 500 cc, Service Manual

Page: 103 / 239

8 - 10
- 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
- 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
020074Y
- 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.
Warning
05_270
05_269
Driving shaft crankcase