Make the rear wheel turn until you find the position where chain is tightest. Set the vehicle on the side stand. Push down the chain at the point of measurement and release. Measure the distance between the "aperture" upper profile and pin centre.
The read distance must be: 9 to 11 mm.

Important
If the drive chain is too tight or too slack, adjust it so that tension reading will fall within specified range.
To adjust the tension remove the rear splash guard (sect. 7 - 13, Removal of the swingarm).
Slacken off the two clamp screws (1) that secure the rear wheel hub to the swingarm.
Fit the hook spanner code 88713.1038 Inserting its tooth in the eccentric hub (2).
Rotate the eccentric hub (2) to obtain the correct chain tension.
Turn counter clockwise to tighten the chain; clockwise to loosen (from chain side).
Important
An incorrectly tensioned chain will lead to accelerated wear of the transmission components.
If the screws (1) are removed, lubricate with specified grease underhead and thread, then tighten the screws (1) to the torque of 35 nm +/- 5% (sect. 3 - 3, Frame torque settings) proceeding with sequence 1-2-1.

Warning
The correct tightening of the fixing screws of the eccentric hub is essential for the safety of the rider and the passenger (sect. 3 - 3, Frame torque settings).
Refit the rear splash guard (sect. 7 - 13, Refitting the swingarm).
Adjusting the steering head bearings
Checking brake pad wear and changing brake padsRemoval of the rear brake calliper
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 ou ...
Refitting the front brake system
While refitting the system, pay special attention to the orientation of the
pipe couplings (24) on the pump and the pipes
(13) and (20) on the callipers (9) and (18).
Warning
If incorrectly positioned, the hose can affect brake operation and
foul moving parts. Position the hose as shown in th ...
Refitting the hands free
Reassembly is a reversal of the removal procedure: in particular apply
prescribed threadlocker to screws (2) and tighten
them to a torque of 20 nm +/- 10% (sect. 3 - 3, Frame torque settings).
If the hands free button has been previously removed, when refitting it insert
the spring (6) on pi ...