Reassembly Of The Cylinder Head - Ducati Diavel Workshop Manual

Cylinder head assemblies: valves - rocker arms
Checking the rocker arms
Check for signs of wear, grooves or chrome flaking off.
Check the condition of rocker arm bore and shaft.
Assembly clearance: 0.025 to 0.049 mm.
Wear limit: 0.08 mm.
Opening and closing shims - Springs
Check the condition of the contact surfaces of the valve opening and closing shims: there must be no signs of wear.
Check the condition of the closing rocker arm return springs: check for cracking, distortion, or loss of elasticity.

Reassembly of the cylinder head

The exhaust side can be identified by the three threaded holes on the flange.