thank you, the needle jet sounds like the next thing to consider or I find a carb that matches the inlet. I have a concentric that would match. I had a Mukuni on my Triumph before I broke it - the Triumph that is.. I should have mentioned i'm at 6200 ft above sea level (1800m) I currently have the needle on the lowest setting (the top notch) and I have jetted teh main jet down to 180 today, so I'll see how that translates this next week or so.
Thank you again, all good advice and things to try,
Guy