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Skidmarx,

Thanks, but yep have tried that, even when warm still the same.

Just nipped home and drained the carbs, back still seems to have a lot more in than the front.

Mister C - Suppose it's good that its not just me! I had my plugs out cleaned, gapped and back in on Saturday, when I serviced, and ran fine for the test ride after and no rain or wash since, so I think I can discount water for mine. Hope you get yours sorted - I had a similar prob before and think it was water in the tank. Try that - this time though no sign of water in the samples I have taken.

Couple of things I'm going to give a go tonight,
Check the fuel vaccum tap, fuel filter, go and get some fresh petrol, may be pick up a bottle of additive. Drain the carbs (again!) run the petrol through and see how we go.

I guess it could all be down to a bit of dodgy petrol. Fingers crossed!

Failing that does anyone know a good mechanic in Cardiff?

Cheers

Mike