To check the wear of the final drive, visually check the pinion (14) and sprocket (17). If the teeth are found to worn as shown in the figure (dotted line), the sprocket must be renewed.


To check the amount of wear on the chain (8), keep the chain taut and measure 16 links.
If the length (l) is greater than 256.5 Mm, the chain should be replaced.
Important
The sprocket (17), engine pinion (14) and chain (8) must all be replaced together as a set.

Final drive
Removing of the front sprocketRemoval of the camshafts
Unscrew and remove the screws (7) and the o-rings (8) from the cylinder head
covers.
Remove the cylinder head cover (6).
Remove the gaskets (4) and (9).
Repeat the same procedure for the other cylinder head cover. Unscrew the
screws (3) securing the camshaft supports.
Withdra ...
Refitting the front wheel
When all the necessary inspections have been completed, refit the wheel as
follows.
Fit the spacers (3) and (9) to the seal rings on the sides of the wheel hub.
Install the complete wheel between the fork legs.
Lubricate the shank and thread of the wheel axle (10).
Take the pin ...
Overhaul of the gearbox
Check the condition of the front coupling dogs of the gears. They must be in
perfect condition and with no sign of wear on
the edges of the teeth.
The idler gears must rotate freely on their shafts.
When refitting, make sure the circlips are correctly positioned.
Check the needle roller ...