Ducati SUPERBIKE 848 MY 2008 Manual page 502

Cylinder head assemblies: valves - rocker arms
Refitting the valves, closing shims and half rings
Carefully clean the two intake valve seats (A) and the two exhaust valve seats (B).
Lubricate the stems of the two intake valves (14) and the two exhaust valves (11) with engine oil.
Install the valves in respective seats in the cylinde head.
Hold the closing rocker arm (16) pushed downwards and fit the closing shim (7) on the valve stem. If using the old
cylinder head, start by fitting the original shim.
Insert the new half rings (6) and release the rocker arm to ensure that they seat inside the shim (7). To ensure the
half-rings are seated in the shim, tap the end of the rocker arm (16) with a rubber mallet.
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