Ducati Diavel Workshop Manual page 103

Fairings
Apply threadlocker to the screws (14).
Place the tank fairing (22) on the tank and keep it in position by starting the screws (14) together with the relevant nylon
washers (15).
Tighten to torque of 2 Nm ±10% (Sect. 3 - 3, Frame torque settings) the screws (14).
Fit the tank LH fairing (21) and keep it in position by starting the screws (16) together with the relevant washers (17).
Apply some threadlocker on the screw (14), fit the nylon washer (15) and start the screw.
Tighten the screw (14) to a torque of 2 Nm ± 10% (Sect. 3 - 3, Frame torque settings) and the screws (16) to a torque
of 0.33 Nm ±10% (Sect. 3 - 3, Frame torque settings).