Ducati SuperBike 1098S Use And Maintenance Manual page 77

Clutch system
If the control lever has excessive play and the transmission
snatches or jams when engaging a gear, then there is probably
air in the circuit. Contact a Ducati Dealer or Authorized
Workshop, who will check the system and bleed the circuit.
Warning
The level of clutch fluid tends to increase in the
reservoir as the friction material on the clutch plates
wears out. Do not exceed the specified level (3 mm
above the minimum level).
E
fig. 64
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