Hi Dan and welcome to Ninjette!
First, post picture of your compression gauge. If it has release valve out near gauge, entire volume of hose up to that valve will be considered part of combustion chamber, resulting in low reading.
To do wet test, remove plugs and squirt in about 1cc of oil. I use little squeeze bottle of oil I use to lube lathe and mill machining projects. Also cold engine will always yield low compression wet or dry.
When you measured valves clearances, did you check valve timing? That is all the marks on crank and each cam lines up properly?
Most likely, lack of fuel due to dried petrol clogs may be preventing starting. Dried petrol turns to plastic when sitting for over 3-months and requires mechanical scrubbing to remove as it will not dissolve again. You'll need ultrasonic cleaning with caustic radioactive solvents for weeks on end. Scrubbing all fuel passages with brushes of appropriate size (follow fuel-flow from beginning to end). Finish with micro soda-blasting at 10000 psi. Along with some other maintenance steps, then your carbs may be factory-fresh clean and run like it just left showroom floor.
Do search here for "clean carbs ducatiman" for photos and procedure on what's needed to thoroughly clean carbs. Good luck!
