Ducati Multistrada 620 2005 Manuel D'utilisation Et Entretien page 150

Clutch system (fig. 46)
If the control lever has excessive play and the transmission
snatches or jams as you try to engage a gear, it means
that there is air in the circuit. Contact a Ducati Dealer or
Authorized Workshop to have the system inspected and
air drained out.
Warning
Clutch fluid level in the reservoir tends to increase
as the clutch plates' friction material wears out. Do not
exceed specified level (3 mm above minimum level).
(Max)
3mm
MIN
E
fig. 46
57