Undo the screw (15) and remove the rear shock absorber (11) from the rocker arm (18).
Undo

Undo the screw (14) and the nut (21) and remove the linkages (10) and (12) from the rocker arm (18).

The rocker arm movement is obtained by needle roller bearings (9) rotating on a spacer (13); two seals (8) are placed at the outer ends and keep the lubricant inside the roller cages.
Remove the inner spacer (13), the seals (8) and the needle roller bearings (9) using a suitable punch.
Important
Take care not to damage the bearing housings on the rocker arm while driving out the bearings. Once removed, the seals (8) and needle roller bearings (9) may not be refitted.

Removal of the rear shock absorber
Reassembly of rear shock absorber - rocker arm - linkage assemblyFirst warning - oil service 1000 km
The first warning is activated at 1000 km (600 miles) of odometer reading.
The (red) warning is activated as a large icon for 10 seconds upon every key-on
(1) then as a small warning that
remains displayed (2) until it is reset.
...
On/off switch on handlebar
Introduction
The on/off switch on the handlebar is used to switch the dashboard on and
off, if a key has been detected, and start the
engine.
With the switch turned to "run off" (centre position), pushing downwards
switches the dashboard on or off (activating
the button inside the switch). ...
Removal of the timing gears
Slide out driving gear (a) of timing gear pair (13) and remove the woodruff
key (14).
Relieve the staking on the lock washer (12) of the nut (11).
Restrain the driven timing gear by inserting a pin in one of the holes, and
unscrew the nut (11).
Remove the nut (11), washer (12) ...