PIAGGIO ZIP 4T - Inspecting the Springs and Half-Cones; Refitting the Valves; Inspecting the Cam Shaft

Inspecting the springs and half-cones
- Check that the upper spring caps and the cotter
halves show no signs of abnormal wear.
Refitting the valves
- Lubricate the valve guides with graphite grease.
- Place the lower plates of the valve spring on the
head.
- Use the punch to fit the 2 sealing rings one at a
time.
Specific tooling
020306Y Punch for assembling valve seal
rings
- Fit the valves, the springs and the upper caps.
- Using the appropriate tool, compress the springs
and insert the cotters in their seats.
Inspecting the cam shaft
- Inspect the cam shaft for signs of abnormal wear
on the cams.
Characteristic
Standard diameter - Bearing A:
Ø 12 +0.002 +0.010
mm Standard diameter - Bearing B:
Ø 16-0.015 -0.023 mm
Minimum diameter allowed - Bearing A:
MSS ZIP 100 4T Engine
ENG - 101