PIAGGIO 500 cc Service Manual page 85

Thermal unit and timing system
- Clean the cooling system outlet union with jets of
compressed air.
- Check the O ring sealing.
- Assemble the union with the larger diameter facing
the transmission side. Tighten the 2 fixing screws to
the prescribed torque.
- Assemble the spark plug and tighten it to the pre-
scribed torque.
Tightening torque:
Cooling system outlet union fixing screws: 3 - 4 N·m
Spark plug: 12 - 14 N·m
- Fit the timing control chain on the driving shaft re-
specting the original direction of rotation.
- Assemble the tension pad and relevant spacer, tighten
the fixing screw to the prescribed torque. Smear
thread locking compound LOCTITE medium type
242.
Tightening torque:
Tension pad fixing screw: 10 - 14 N·m
- Assemble the pins and equalizers from the flywheel
side.
- Lubricate the 2 equalizers through the upper holes.
- Clean the camshaft by means of compressed air, in
particular the groove, seat of the stop plate.
- Lubricate the 2 supports.
- Assemble the camshaft in the head, with cams oppo-
site to the equalizers.
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05_219
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05_220
05_167
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