PIAGGIO Runner 125 - Page 169

Fit the pins and rocking levers.
- Lubricate the two rocking levers through the
holes at the top.
- Lubricate the 2 bearings and insert the cam shaft
in the cylinder head with the cams corresponding
to the rockers.
- Insert the retention plate and tighten the two
screws shown in the figure to the prescribed tor-
que.
Locking torques (N*m)
Plate screws 4 ÷ 6 Nm
Insert the spacer on the cam shaft.
- Rotate the engine so that the piston is at top dead
centre, using the reference marks on the flywheel
and the crankcase.
- Holding this position insert the chain on the cam-
shaft control pulley.
- Insert the pulley on the cam shaft while keeping
the reference 4V in correspondence with the ref-
erence mark on the head.
- Assemble the counterweight with the corre-
sponding fixing screw and tighten to the prescribed
torque.
Locking torques (N*m)
Counterweight screw 7 ÷ 8.5
Fit the end-of stroke ring on the valve-lifting mass
and fit the automatic valve-lifting cam to the cam-
shaft.
N.B.
LUBRICATE WITH GREASE THE END-OF-STROKE RING
IN ORDER TO AVOID ACCIDENTAL LEAKS THAT MAY
FALL INTO THE ENGINE. ASSEMBLE THE AUTOMATIC
VALVE-LIFTER RETURN SPRING. DURING THIS OPERA-
TION THE SPRING MUST BE LOADED AT APPROXIMATE-
LY 180°.
Runner 125 - 200 Engine
ENG - 169