PIAGGIO 500 cc - Valve-Guide Play Check; Valve Standard Length

7 - 17
7
05_201_2
05_201_3
05_202
Gruppo termico e distribuzione
YES NO
- Check that the surface in contact with the register
articulated terminal shows no signs of wear.
Valve standard length
Intake: 95.0 ± 0.3 mm
Exhaust: 94.2 ± 0.3 mm
- Check the valve head concentricity by placing a dial
gauge at right angle to the valve head and turning the
valve head on a “V” surface.
Limit allowed: 0.03 mm
Valve-guide play check
- After measuring the valve guide and valve stem
diameters, check the guide-and-stem play.
Intake:
Standard play: 0.013 - 0.04 mm
Limit allowed: 0.08 mm
Exhaust:
Standard play: 0.025 - 0.052 mm
Limit allowed: 0.09 mm