Erm soz to pick up on this again guys.
Took Pod's advice to drain carbs ... hmmm ... much cussing etc ... was able to do rear carb without too much fuss while carbs in situ, but I am buggered if I can access the front one without taking the carbs out the frame, which I didn't have time to do last night.
So I drained the rear carb, but wasn't able to check for water presence, as I didn't capture the contents, just let them p*ss on to the floor (warning ... do not smoke in my garage!!)
Anyway, bike didn't stutter this morning. but that could have just been good fortune.
Any tips from any learned people out there on how best to access front carb for drain, with as little complications as poss.
Thanks again
Tony
PS I also learned yesterday that water is heavier than petrol, hence it sits at bottom of float bowl ... I love new knowledge (though I suspect loads on the site already knew this!!). Oh and also, fuel at garages often contains water.