Its no problem at all. Just follow a video from youtube and have the workshop manual to hand for torque values.
I have 05 S2R 800, I changed:
- Oil (Halfords)
- Oil Filter (Picked up from Ducati Coventry)
- Air Filter (Picked up from Ducati Coventry)
- Chain and sprocket (Ebay)
- New plugs (Picked up from Ducati Coventry)
- New cambelts (Picked up from Ducati Coventry)
- New tyres (had to take the wheels to a garage to have the changed over) (Ebay)
- New front calipers and pads (changed from smalls to goldlines) (Ebay)
- New disks (Ebay)
As long as you have the tools and manuals all of the jobs are easy as pie. Some nuts and bolts are a b*tch to get off, but they'll come eventually
There is an internal oil element filter on some of the engines, I couldn't for the life of me get mine out, but that's no biggy as the oil is regularly changed.
You save a packet doing it yourself. I think I spent in the region of £350-£400 for all of the above parts, that can be the price of a service at some places.