stuM

Thought I'd finish this thread off in case anyone else has the same issue.

The problem was simple... front plug and cap corroded and full of water as many threads on here. I'd already fixed it when I wrote the original post. The problem was that I was running it with the airbox off and the mix was so lean it wouldn't rev cleanly. Popping the airbox back on had it running perfectly!

Makes me think I should probably up the mains to cater for the race exhaust!