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.
Remove the front wheel (sect. 7 - 1, Removal of the front wheel).
Undo the retaining screws (5) of the disc to the wheel, remove the disc (7) and, on its left side, slide out the phonic wheel (6).

Removal of the front brake system
Overhauling the front brake componentsTiming system
Central external cover
Air filter
Horizontal cylinder timing belt cover
Screw
Filter support
Screw
Washer
Nut
Tensioner pulley assembly
Circlip
Camshaft pulley
Tensioner pin
Idler pulley assembly
Timing belt
Nut
Key
Spacer
Camshaft pulley
Driveshaft pulley ...
Removal of the licence plate holder
Disconnect connector (5) of the number plate holder wiring from the main one.
Release the number plate holder light cable from the ties and the cable grommets
as indicated in sect- 7 - 6, flexible
wiring/hoses positioning, since the cable is together with the rear abs sensor
cable.
...
Keys (fig. 62)
The owner receives a set of keys comprising:
1 Active key (1, fig. 62)
1 Passive key (2, fig. 62)
It contains the code used by the "hands free" system for the
key-on, in different modes.
The active key (1, fig. 63) Is the one that is normally used:
press button (a, fig. 63) To ...