Well it's running beautifully now so I can only assume it was water or a loose connection somewhere. I've bought some dielectric grease cheers for that advice btw. Couldn't believe the power increase lol.
I would have assumed it would run lumpyer with a fault like this but it felt smooth enough. Mind you I tuned it I expect with the fault so who knows.
Pulled snorkel btw and retuned. Pisses 80 now. It's like new bike.
Either way result!!! Many thanks
