Ducati MONSTER 821 Workshop Manual page 1128

If previously removed, apply the indicated product to the thread of oil drain plug (31) and tighten to a
torque of 20 Nm (Min. 18 Nm - Max. 22 Nm).
If previously removed and disassembled, refit the clutch fluid flow adjuster valve, as follows:
- insert plate (33) on spring (34) until it locks in place;
- fit O-ring (36) in its seat on special dowel (37);
- fit the ball (35), the spring (34) with plate (33) and the special dowel (37) with O-ring (36) on chain-side
crankcase half.
Drive nut (32) fully home.
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