Ducati 998S BOSTROM Owner's Manual page 25

STANDARD factory setting is as follows:
compression: 10 clicks;
rebound: 12 clicks.
Max. setting for softest damping adjustment is 24 clicks
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.
E
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