VESPA 633844 IT Service Manual page 142

Engine
Refitting the rocker-arms cover
- Refit the cylinder head cover, tightening the 5
clamping screws to the prescribed torque.
- Make sure the gasket is positioned properly.
Locking torques (N*m)
Tappet cover screws 6 - 7 Nm
ENG - 48
Vespa GTV 250 i.e.