Throttle Jerky At Low Revs ?

[PieEater]

Thanks mate, I have had my suspicions that it was probably the EXUP, I just wanted a second opinion before I attempt to fix it. It looks a fairly straightforward operation without the need of 3 years of mechanical college courses. Is there any tricky bits i should be aware of whilst servicing ? Much appreciated 

No tricky bits just follow Pat's guide, have a container for all the parts as you take them off and after cleaning refit using lots of copper grease or even better ceramic grease. I printed off Pat's guide and referred to it for the first couple of services but after that it's straightforward enough. It may not be the EXUP that's the problem as it's unlikely anything has happened since you last rode the bike to stop it working properly (barring a mouse chewing through a cable) but it's a fairly simple job to do and one that you shouldn't neglect.