RE: 4-stroke engine
Yes, if you have a Ducatti the biggest maintenance issue is the valves. Every 3-4000 miles? You can check them as often as you like.
If you can wait I would use the OS FSa-81 when it arrives. It has a lubrication system that ensures oil will get to the top of the valve train and there are no breather vents to mess with. The FSa-56 is already out.