Ducati MULTISTRADA 1200S ABS 2015 Workshop Manual page 989

Apply engine oil to the thread and underhead of screws (9). Start screws (9).
Pre-tighten screws (9) to a torque of 10 Nm (Min. 9 Nm - Max. 11 Nm).
Pre-tighten one support at a time, working in the sequence 1-2-3-4-5-6-7-8.
Then tighten screws to a torque of 22.5 Nm (Min. 21 Nm - Max. 25 Nm).
Tighten one support at a time, working in the sequence 1-2-3-4-5-6-7-8.
Turn the camshafts by hand to check that they rotate freely.