Bold reference numbers in this section identify parts not shown in the figures alongside the text, but which can be found in the exploded view diagram.

The brake master cylinder manufacturer advises against servicing the brake master cylinder due to the safety critical nature of this component. Incorrect overhaul of these critical safety components can endanger rider and passenger safety.

Maintenance operations on these units are limited to replacing the following parts: control lever, reservoir unit, reservoir fasteners and master cylinder fasteners.

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 the special screw (15) securing the brake hose to the master cylinder and recover the sealing washers (12); slide hose (14) out of front master cylinder.

Loosen the screws (8) securing the mounting U-bolt (11) and then remove the front brake master cylinder assembly (1) from the handlebar.

Insert the front brake master cylinder unit (1) on the right side of the handlebar to bring the terminal internal edge in correspondence to the bolted joints (A).

Locate the pipe (14) and the gaskets (12) on the master cylinder unit (1) and secure with the special screw (15), but do not tighten at this stage.

Tighten the retaining screws (11) to a torque of 10 Nm ±10% (Sect. 3 - 3, Frame torque settings) in the sequence 1-2-1 starting from the upper screw.

Orientate the pipe (14) as illustrated in the figure and then tighten the special screw (15) to a torque of 23 Nm ± 10 %
(Sect. 3 - 3, Frame torque settings).

Brake fluid is corrosive and will damage paintwork. Avoid contact with eyes and skin. In case of accidental contact, wash the affected area with abundant running water and consult a doctor if necessary.

For all the maintenance operations (wear check and replacement of brake pads and brake fluids, etc.) see Sect.  4 - 3, Maintenance operations.

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 the special screw (15) securing the brake hose to the master cylinder and recover the sealing washers (12); slide hose (14) out of front master cylinder.

While removing the front brake hose, if you damage the hose clip (B) you shall renew it (Sect. 5 - 4, Removal of the front mudguard).

For correct position of the ties fastening the ABS sensor cable (A) to front brake lines, please refer to Sect. 7 - 6, Flexible wiring/hoses positioning.

The front brake discs consist of an inner carrier, which is mounted to the wheel, and an outer rotor. Both parts must be changed together as a pair.

Loosen the fixing screws (29) of the disc to the wheel, remove the disc (30) and in the ABS version, on its left side, slide out the phonic wheel (20).

Critical safety components. The manufacturer of the brake calliper advises against servicing the internal components of callipers. Incorrect overhaul of this component could endanger rider safety.

To check brake disc wear, refer to the service limits given in the paragraph “Hydraulic brakes“ (Sect. 3 - 1.1).

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 (29).

Tighten the retaining screws (29) to a torque of 25 Nm 5% (Sect. 3 - 3, Frame torque settings).

When reconnecting the brake hose to the calliper or master cylinder, make sure to install the sealing washers (12) either side of the hose end fitting.

After orientating the coupling, lock the special screw (15) to a torque of 23 Nm ±10% (Sect. 3 - 3, Frame torque settings).

Reconnect the hoses (14) and (24) to the front brake callipers (7) and (18) and tighten the screws (13) and (27) to a torque of 23 Nm ±10% (Sect. 3 - 3, Frame torque settings).

Tighten the screws initially to a torque of 2 Nm ±10% (Sect. 3 - 3, Frame torque settings).

Repeat the operation for the left brake calliper (7).

Hold the lever pulled in towards the grip and tighten the calliper screws (7) to a torque of 45 Nm ± 5% (Sect. 3 - 3, Frame torque settings).

Insert hose (14) in bracket (4) and tighten screw (16) to a torque of 8 Nm ±10% (Sect. 3 - 3, Frame torque settings).

For correct position of the ties fastening the ABS sensor cable (A) to front brake lines (24), please refer to Sect. 7 - 6, Flexible wiring/hoses positioning.