Cheers again John

I found a cd with a manual on it. 2 turns out is spot on. Mine were all different. Still getting a horrid knock from the bottom of the engine though. Maybe a carb balance will help.
Fugging fuel filter finally arrived today and fitted that as well.
Also notised zorst had a small hole in it so stuck a bolt and some poxy resin in it. should work
Engine seems to be running hot - or maybe its just the weather

Will take the bike to bike shop tomoz and see what my mate reckons.
cheers
Pete