The front fork used on this motorcycle has rebound, compression and spring preload adjustment.
The settings are adjusted using external adjuster screws.

Park the motorcycle in a stable position on its side stand.
Turn the adjuster (1) on fork leg top with a flat screwdriver to adjust rebound damping.
Turn the adjuster (3) on fork leg bottom with a flat screwdriver to adjust compression damping.
Turn the adjusting screws (1 and 3) to adjust the dampening.
Turn the screw all the way in to set the hardest damping (position "0"). Starting from this position, turning anticlockwise, you can count the turns.
To change preload of the spring inside each fork leg, turn the hex. Adjuster (2, fig. 109) With a 22 mm hexagon wrench, starting from the fully open position (clockwise). From reference (a, fig. 109), Every full turn clockwise corresponds to 1 mm of preload of the spring, up to a maximum of 15 mm, corresponding to 3 full turns.

Standard settings, from fully open position, are as follows: compression: 1 and a half turns; rebound: 1 and a half turns.
Spring preload: fully open (anticlockwise).
Important
Adjust both fork legs to same settings.
Passenger grabhandle
Adjusting the rear shock absorberOverhaul of the crankcase halves
Carefully examine the engine crankcase halves.
Check that the surfaces of the crankcase halves are perfectly flat using a
reference surface.
Check that the bearings (1) and (18), and the bushings (2) and (17) are in
optimum conditions. Note that the main
bearings must always be changed in p ...
Refitting the timing gears
Before reassembling the removed parts, check timing gears (13) for wear.
Change, if necessary.
Important
The timing gears (13) must always be renewed as a pair.
Refitting is the reverse of removal.
Warning
When introducing the driven gear (b) check that the tongue (15) is
correctly fitted o ...
Checking the camshafts and supports
Check the cam contact surfaces for scratches, grooves, steps and waving.
Worn cams are frequently the cause of poor timing, which leads to loss of engine
power.
Place the camshaft between two centres and check the run-out on the areas
indicated using two dial gauges.
Service limit: 0.1 ...