Ducati 999R Owner's Manual page 133

STANDARD factory setting is as follows:
compression: 10 clicks;
rebound: 12 clicks.
The adjustment ranges are as follows:
compression: 30 clicks
rebound: 28 clicks.
Max. setting for softest damping adjustment is 24 clicks
E
for rebound and 28 clicks for compression.
To change the preload of the spring inside each fork leg,
turn the hex. adjusting nut (2) with a 22-mm hexagon
wrench.
Factory setting is 10 mm.
Important
Adjust both fork legs to same settings.
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