Undo and remove the four screws (1) securing the brake disc to the wheel shaft, and remove the rear brake disc (2).
Loosen the screws (3), and remove the rear phonic wheel (4).
The brake disc must be perfectly clean, with no rust, oil, grease or other dirt and no deep scoring.
To check the wear limit of the brake disc, refer to chapter "Technical data".
Position rear brake disc (5) on rear wheel shaft (P), aiming it with chamfered sides (A) facing upwards.
Fasten the disc by starting screws (1) after applying recommended threadlocker.
Tighten the screws (1) to 27 Nm ± 10%, following a 1-2-3-4 sequence.
Position the phonic wheel (4) on brake disc (5), aiming it as shown in the figure.
Fasten phonic wheel (4) starting screws (3) after applying recommended threadlocker.
Tighten the screws (3) to a torque of 5 Nm ± 10%, in a cross pattern.