Ducati Diavel Workshop Manual page 675

Cylinder head assemblies: timing system
Fit the pulley (11) on the camshaft, inserting the Woodruff key in the in the slot (C) in the pulley.
Apply the recommended grease to the threads on the end of the camshaft.
Repeat the procedure on the other camshaft.
Insert the tool code 88713.1806 into the pulleys to prevent rotation.
Apply the recommended grease to the mating face of the nut (21).
Fit the nut (21).
Carry out the same operations on the other camshaft.
Important
Always fit new nuts on reassembly.
Using the bush supplied with tool with part no. 88713.1806 and a torque wrench, tighten the ring nuts (21) to the
specified torque of 71 Nm (Min. 64 Nm - Max. 78 Nm) (Sect. 3 - 3, Engine torque settings).
Insert the fixed tensioners (13), with bearings and washers (7), into the cylinder head pins and tighten the nuts (8) to a
torque of 25 Nm (Min. 22 Nm - Max. 28 Nm) (Sect. 3 - 3, Engine torque settings).