Ducati MONSTER 821 Workshop Manual page 879

Use the bush supplied with tool no. 88713.1806, and a torque wrench to tighten ring nuts (1) to 71 Nm
(Min. 64 Nm - Max. 78 Nm).
Insert the fixed tensioners (4) with relevant bearing in the head pins and tighten screws (3) to a torque of
50 Nm (Min. 45 Nm - Max. 55Nm).
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