Important
The brake manufacturer advises against any servicing of the internal components of brake callipers or the master cylinder.
Incorrect overhaul of these critical safety components can endanger rider and passenger safety.
Before removing the parts in question, you must first carry out the following operations:

note
For the abs front braking system, also refer to sect. 7 - 5, Abs system operating information, sect. 7 - 6, System components, sect. 7 - 7, Abs components maintenance.
Unscrew and remove the special screw (22) fixing the pipes (33) to the rear brake calliper and the corresponding couplings (23).
Remove tube (33).
Undo the two fixing screws (12) of the rear brake calliper (15) to the calliper holder bracket and remove the brake calliper (15).
If it is necessary to remove the calliper holder bracket (a) refer to sec. 7 - 13, Removal of the rear wheel eccentric hub and rear wheel shaft.
Note
To replace the brake pads follow instructions in the paragraph "checking brake pad wear and changing brake pads" (sec. 4 - 3).
To remove the speed sensor (1), undo the retaining screw (2), having care not to damage the airgap spacer (8) and the washer (32).

Only the following parts should be renewed:
Refer to the exploded view at the beginning of this section for indications on renewal of the above components.
Refitting the rear brake control
Removal of the rear brake discHands free system key-on and key-off
Key-on consists in turning on the hands free system and all
of its electronic devices.
Key-off consists in turning off the hands free system and all
electronic devices, and makes sure the engine is turned off.
Key-on is done using the button (6) on the handlebar on the
right switch or using ...
Removing the frame and the lateral footrests
Loosen the two special screws (6) to separate the frame (1) from the lateral
brackets (2) and (3).
On the left side of the vehicle block retaining pins (9) and loosen the nuts (8)
on the right side at the same time.
Slide out the retaining pins (9) and remove the frame (1) from the lateral ...
Refitting the filler cap
Position seal (18) in tank cap (10) as shown and reassemble following the
removal procedure in the reverse sequence.
In particular tighten the screws (17) to a torque of 3 nm +/- 10% (sect. 3 - 3,
Frame torque settings).
...