Ducati hipermotard 2016 Owner's Manual page 182

Brake system
If you note too much play on brake lever or pedal and
brake pads are still in good condition, contact your
Ducati Dealer or Authorized Service Center to have
the system inspected and any air drained out of the
circuit.
Attention
Brake fluid can damage paintwork and plastic
parts, so avoid contact.
Hydraulic oil is corrosive; it may cause damage and
lead to severe injuries. Never mix fluids of different
qualities. Check seals for proper sealing.
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