Ducati Diavel Workshop Manual page 551

Fuel tank
delivery on the filler marked with OUT and the return on the filler marked with IN.
Connect connector (D) of the fuel level sensor to the main wiring.
Attach the fuel hoses (12) to the hose clips (14).
Refit the flange cover (A) by tightening the screws (B) to a torque of 4 Nm ± 10% (Sect. 3 - 3, Frame torque settings).
Position, without tightening, the front retaining screw (4).
On both sides of the tank plug, place the two breather pipes (8) and (15) and insert them on the plug.
Check correct position of the tank (1) and tighten the two front retaining screws (4) to a torque of 10 Nm ± 10% (Sect. 3
- 3, Frame torque settings).