PIAGGIO MSS ZIP 100 4T, Service Manual

Page: 103 / 192

Refitting the head and timing system components
- Fix the head on a workbench.
- Screw the tool to fit the camshaft fully down on
the bearing's inner track.
- Fit the camshaft fully into its seating together with
the bearing with the aid of a mallet.
- Remove the tool.
- Fit the head gasket after cleaning the faying sur-
face carefully.
- Insert the head in the cylinder stud bolts and
tighten the 4 fixing nuts to the prescribed torque.
Specific tooling
020450Y Camshaft fitting/removal tool
Locking torques (N*m)
Head-cylinder stud bolt nuts:
6 ÷ 7 +135° +90° Nm
first fitting, upon refitting tighten again at 6 ÷ 7 90° +90° Nm
- Loosen the rocking lever registers.
- Fit the pin, the intake rocking lever and the dis-
charge rocking lever.
- Lubricate the 2 rocking levers through the holes.
N.B.
IF A BEARING SEPARATES FROM THE CAMSHAFT, IT IS
ESSENTIAL TO FIT A NEW BEARING.
- Screw the limit screw for the pin and the camshaft
with the washer indicated in the figure and tighten
it to the prescribed torque.
Locking torques (N*m)
Rocking lever axle and camshaft bearing
screw
3 ÷ 4 Nm
MSS ZIP 100 4T
Engine
ENG - 103