The brake master cylinder is supplied only as a complete unit; internal components cannot be replaced.
To disassemble the master cylinder's outer parts, follow the indications given in the exploded view at the beginning of this section.
If the bush (10) inside the brake pedal (6) needs to be replaced, grease the external surface and fit the new bush using a press to insert it. The bush must be placed at 2 mm from the pedal external face.

To disassemble the various parts of the system, refer to the exploded view at the beginning of this chapter.
Warning
After performing an operation on the rear brake control, check the brake pedal position following the instructions detailed in sect. 4 - 3, Adjusting the position of the gear change and rear brake pedals.
Removing of the rear brake control
Refitting the rear brake controlRefitting the brake disks
Before refitting the brake disc to the wheel, clean all contact surfaces
thoroughly and smear a medium strength
threadlocker on the threads of retaining screws (5).
Operating on the left side, fit the phonic wheel (6).
Tighten the fixing screws (5) of the brake disk (7) to the wheel followi ...
Removal of the expansion tank
Loosen the clamp (6), open the hose guide (a) and slide the hose (7) out of
the radiator.
Open clamps (14) and release the hoses that pass through them.
Loosen the screws (16).
Remove the tank (12) with its hoses (7) and (20) and the support (15).
Loosen the clamp (19) to r ...
Removing the valves
Raise the rocker arm (3) and remove the opening shim (5) from the valves with
a pair of pliers.
Push down the closing rocker arms (16) and (4) and the closing shim (7).
Remove the half rings (6) from the valves with a magnetic screwdriver. Extract
the closing shims (7) from the valve ...