Ducati Streetfighter Owner's Manual page 72

Warning
Use a pin wrench to turn the preload adjusting ring nut.
Take special care when turning the ring nut, to avoid injuring
your hand by striking it violently against other parts of the
motorcycle if the wrench suddenly slips off the nut while
turning.
Warning
The shock absorber is filled with gas under pressure
and may cause severe damage if taken apart by unskilled
persons.
Front fork
Rear shock absorber
Front fork
Rear shock absorber
Rebound
2.5 turns from fully 1.5 turns from fully
closed
9 turns from fully 1.5 turns from fully
closed
2.5 turns from fully 1/2 turn from fully
closed
5 turns from fully 1/4 turn from fully
closed
When carrying a passenger and luggage, set the rear shock
absorber spring to proper preload to improve motorcycle
handling and keep safe clearance from the ground. It may
also be necessary to adjust the rebound damping
accordingly.
The table below shows the suspension settings for different
uses of the vehicle.
Compression Spring preload
2 turns from fully open
closed
closed
2 turns from fully open
closed
closed
Setup for "comfort"
road use
23 mm
Setup for "sport" road
use
23 mm
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