PIAGGIO Vespa LX 150 4T Euro 3 Service Station Manual page 184

Braking system
ALL THE SEALS AND GASKETS MUST BE REPLACED EVERY TIME THE PUMP IS SERVICED.
1. Reservoir cap screw
2. Reservoir cap.
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 - 10
Vespa LX 125 - 150 4T Euro 3