Undo the screws (11) and remove the chain cover (10).
Loosen the chain (sect. 4 - 3, Adjusting the chain tension).

Remove the chain with the tool code 88713.1344.
The tool is composed of a holder (a), punch (b), body (c) and two wrenches (d) and (e).
Fit the link to be opened into the holder (a).
Fit a punch (b) into the body (c) and manually unscrew the screw until the punch no longer protrudes.
Fit the holder (a) and link into the body (c).
Manually turn the screw (f) on body (c) so that the punch (b) locates against the pin, taking care that they are aligned with each other.
Fit hex wrench (d) into the hexagonal part of the body (c) and wrench (e) onto the bolt.
Turn the bolt (f) clockwise to push out the pin.


Remove the chain.
Engage a low gear and unscrew the nut (12).
Remove the nut (12) and the safety washer (13) on the pinion.
Remove the engine pinion (14) from the gearbox secondary shaft.

Remove the spacer (15) with o-ring (16) from the gearbox secondary shaft.
Important
The o-ring (16) must be renewed on reassembly.

Inspecting the final drive
Refitting the front sprocketRefitting the expansion tank
If the support (15) has been removed, place the hose clamps (14) on the
bracket (15) orienting them as indicated.
Fully press the pins (a) to block the clamps (14) until pins surfaces (b) are at
the same level of the clamps (14) surfaces.
Apply recommended threadlocker to the thread of the ...
Refitting the timing covers
Locate vertical cylinder external cover (25), horizontal cylinder external
cover (3) and central external cover (1) by
starting the screws (4).
Apply the recommended threadlocker to the screws (4).
Tighten the screws (4) to a torque of 10 nm (min. 9 Nm - max. 11 Nm) (sect. 3 -
3, Engine t ...
Refitting the gear interlock plunger and pawl assembly
On the special screw (3), fit the gear pawl lever (4), orienting it as shown
in the figure, the washer (2) with the square
edge side (d) facing the clutch-side crankcase half, and the spring (1),
positioning it so that the hook end (a) is facing
the gear pawl lever. Locate the hook end (a) of ...