Baghira running issue

[rodge70]

Having a few running issues with my baghira which I think were carb related but when it decides to cut out I'm getting a very : loud heavy mechanical bang.any clues would be helpful
2008 with 22000 miles.tia rodge

[Puffs]

That sounds worrying Rodge.

Can it be too much slack in the timing chain?
A worn timing chain will also result in retarded valve timing, which makes the engine run sluggish.

[rodge70]

think the bang is from one way clutch on starter as had the same noise on my ttr250 years ago and apparently a sign of the sprag clutch worn,bought new one and that sorted it,but will have to dig a bit deeper as bike runs rough at the mo since i parked it up 6 weeks ago.have cleaned carbs and that improved it slightly but still not as crisp as it usually is and a lot of popping on the over run.