Ducati MONSTER 821 Workshop Manual page 1113

Fit the seal (7) on the oil drain plug (6).
Position the seal so that the side with the square edge is facing the chain side crankcase half.
Clean the plug thread, apply a bead of THREE BOND TB1215 along the plug thread spreading it by the
entire circumference (360°).
Screw the drain plug (6) with seal (7) to a torque of 20 Nm (Min. 18 Nm - Max. 22 Nm).
Note
After tightening, remove any excessive sealant.
Refit the neutral sensor (8) and the relevant seal (5).
1113 Ducati Manuals Resource