To the specified intervals in the "scheduled maintenance chart" (sect. 4 - 2) Check the coolant level contained in the expansion reservoir, on the right side of the vehicle.
The coolant level must be between the max. And min marks on the tank.
If the level is low, top up with the recommended coolant.
Remove the filler cap (1) and top up with new coolant to the specified level.
Refit the plug (1).

For optimal operating conditions (coolant mixture starting to freeze at -20 C), the recommended fluid antifreeze should be mixed with water in the following percentages: antifreeze: 35 to 40% of the volume; water: 65 to 60% of the volume.
Important
Very hard water with a high mineral salt content can damage the engine.
Increase the amount of antifreeze to up to 55% volume in the case of very cold climates.
Important
Solutions with less than 30% of antifreeze will not provide sufficient protection against corrosion.
Changing and cleaning the air filters
Changing the coolantRemoving outer components
Note
The following removal operations are required in order to renew and/or
clean the crankcase halves. If the original
crankcase halves are to be reused, then the removal of these components is not
essential.
Unscrew the screw (17) and remove the oil breather valve (1) with the o-rings
...
Reassembling the frame and the lateral footrests
Apply the recommended grease to the thread of the pins (9) and of the nuts
(8).
Place the frame (1) and the brackets (2) and (3) on the engine block. Start the
pins (9) by holding the nuts (8) and insert
without tightening the screws (6) into the adjusters (4).
Position and fix the rear s ...
Removal of the gearbox assembly
Withdraw the selector fork shafts (30).
Move the forks (28) and (29) to disengage them from the slots in the selector
drum (14).
Withdraw the selector drum (16) taking care not to lose shims (31) and (27)
mounted on the shaft. Note that the
positions of the shims must not be inverte ...