Ducati Panigale 959 Corse 2018 Owner's Manual page 218

Clutch system
If the control lever has exceeding clearance and the
transmission snatches or jams as you try to engage a
gear, it means that there might be air in the circuit.
Contact your Ducati Dealer or authorised Service
Centre to have the system inspected and air drained
out.
Warning
Clutch fluid level will increase as clutch plate
friction material wears down. Do not exceed the
specified level (3 mm above the minimum level).
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