VESPA GT 200 Workshop Manual page 147

Vespa GT 125-200
Engine
- 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°.
Assemble the limiting bell using the counterweight
fixing screw as a reference.
- Tighten the clamping screw to the prescribed tor-
que.
Locking torques (N*m)
Limiting bell screw
11 ÷ 15 Nm
ENG - 147
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