VESPA 633844 IT Service Manual page 244

Braking system
3. Diaphragm.
4. Bellows.
5. Sealing ring
6. Piston.
7. Gasket.
8. Spring.
9. Reservoir
Refitting
To refit, carry out the removal operations but in reverse order, observing the specified torques.
Locking torques (N*m)
Oil pipe joint to the pump: 20 - 25 Brake pump fixing screws to the handle bar: 7 ÷ 10 Nm
BRAK SYS - 16
Vespa GTV 250 i.e.