misfire
 

my 97/98 996sps starts to buck as if going onto one cylinder.this doesn't always happen but especially under load when the engine is hot.i've taken it in twice to be looked at but have had no success.any body know how this can be fixed?as it is frustrating and a bit hairy!

What has been checked? Was it a dealer with the mathesis or DDS testers?
If not, get it to a dealer and have the errors read.
I'd guess either throttle sensor or one of the ignition/pump relays

invoice describes check and reset injection,since then,i have also had the full two year service done.I can't really name the dealer but they are an independant ducati specialist with a good reputation although i dont know if they have the equipment you describe

That's cool. Just wondering if there were any errors lurking in there :)
Where are you? If you're close by Nottingham, drop by here and i'll read 'em. If not, ask the guy that serviced your bike if he can read the errors, if not, nip it to a dealer. It'll save a lot of time trying to diagnose what's going off.