Ducati 999 2003 Manuel D'utilisation Et Entretien page 141

STANDARD factory setting is as follows:
compression: 8 clicks (999), 10 clicks (999S);
rebound: 8 clicks (999), 12 clicks (999S).
(999S)
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
E
wrench.
Preload setting range (A, fig. 35) is from 25 to 10 mm.
Factory setting
is 20 mm (999);
is 10 mm (999S).
Important
Adjust both fork legs to same settings.
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999
999S
3
3
fig. 36.1
fig. 36.2