Hi newbie!
You can find maintain table from Owner manual, what can downloaded (I think..) from Download section in this Ducatipaso.org site.
If need to change air filter, U have to take fueltank away and U see then hole air intake system. If You want GOOD air filter to Your hole life, buy K&N. They have one for 907 and surely same element fit to all Pasos... Also chain tighten U can find from owners manual!
Near everybody uses different oils, but i have read lot about this and i recomend Fully synthetic Shell Advance Ultra 20W-50, what is good for "lower" transmission connection noises, and ITS VERY GOOD quality oil. Change oil filter every time, U change oils to engine and surely check also that "hard filter" in right side of engine,,, remembering 24mm wrench.... surely have to take one small part of frame away, but only 4 bolts....
I think, never use engine lower rpms, than 4000(when driving)U can feel too low rpm in Your ass very easily,, if too low rpm, surely better put smaller gear, than destroy some bearings from engine
Antti