Starting Ring Gear And Freewheel; Idler Gear With Torque Limiter - PIAGGIO 500 cc Service Manual

Starting ring gear and freewheel

- Check that the freewheel "rollers" and the starting ring
gear hub surface show no signs of anomalous wear
or dents.
- Check the hub outside diameter.
Hub outside diameter: Ø 45,665
- Check the starting ring gear brass I.D.
- Check that the toothing shows no signs of wear.
N.B.: If the hub is damaged, replace the starting ring
gear and the free wheel. If only the brass is damaged,
it is sufficient to replace the starting ring gear assembly.
In this case also check the diameter and surface of the
driving shaft support. Replace the driving shaft if neces-
sary.
+ 0.020
Brass I.D.: Ø 27 mm
+ 0.041

Idler gear with torque limiter

- Check the toothing out for signs of wear.
- Check the diameter of the two bearings.
Gear bearing diameter: Ø 12
- Also check the bearings diameter on the flywheel
cover and engine crankcase.
Flywheel cover bearing diameter: Ø 12
Engine crankcase bearing diameter: Ø 12
+ 0.008
mm
+ 0.005
- 0 mm
- 0.011
+ 0.034 mm
- 0.016
+ 0.034 mm
- 0.016
Flywheel and starting system
05_143
6
05_144
05_145
05_146
6 - 7