Well I stipped it down, messed about for an hour, moved the chain about on the crank gear, not sure if it helped, didnt look like it did, so it looks like Pieman and Two Wheel n are right... a links a links a link.
Of course thats NOT the end of this story, lol.... for some reason my shims were wrong, maybe my maths were wrong, wrong gauges who knows.. so I called Triumph to make sure they had the ones I wanted and off I went.
Got there, North City Triumph in Romford, in I go and had a chat with one of their mechanics, Danny, only a young bloke but Triumph trained.
He was doing a Bonny shims so we had a look and a chat about my one tooth issue.. he said it may well be cam chain wear and that I should line the marks up slightly behind the timing mark so as NOT to advance the valve timing.
Picked my shims up and went home.. re shimmed valves, put cams back in an bugger me.... the lines are now SPOT ON, timing is perfect.
Was it the chain? was it a tooth on the bottom gear.. well I will never know, what I do know is its back together correct and Im looking forward to firing it up and hearing it
