Ducati Diavel Workshop Manual page 513

Footrest brackets
The removal of the rear footrests is described for the right side but it is the same for both.
Undo the pin (13) and remove the RH rear footrest (12) from the frame.
Recover washer (8) and the O-rings (9).
If necessary remove the rubber footrest (11) of the footrest (12).
Refitting the rear footrests
Note
The refitting of the rear footrests is described for the right side but it is the same for both.
If previously removed, refit the rubber footrest (11) on the rear RH footrest (6), by pushing it until pad (B) engages in the
other side.
Note
The rubber footrest (11) side featuring the least width must be faced to the outer side of the footrest (12).
Apply recommended grease to the seats (G) of the O-rings and in area (H) on the rear RH footrest (12).