[jwasbury]

Actually the adjustment on a 2V duc is pretty easy. On the early monster you only need to remove the seat to gain access to the valve covers. The rocker arm does not need to be removed, but you must slide it aside to change out the shim. You just pry off the spring clip that keeps the rocker centered on its shaft. Closing shims are more difficult, but they've never needed adjusting on my bike (30k miles). The nice thing about the Ducati desmo valve train is that the lack of heavy return springs means that adjustments are seldom necessary. My bike needed a few adjustments in the 1st 10k miles or so, but none in the last 20k.

4v heads are a different story as I believe camshafts need to come out to change shims.