Ducati 998R Manuel De L'utilisateur page 109

Checking brake pads for wear (fig. 30)
To facilitate inspection without removing the pads from
the calipers, brake pads have a wear mark. If the grooves
in the friction material are still visible, the pad is still in
good condition.
Important
Have the brake pads replaced at a Ducati Dealer or
Authorized Workshop.
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fig. 30
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