Scooterotica

Hi Spud
I thought so, this is the same problem I had at the start.
All I did was to take the float bowl off and cut the little float stop off as low as i could allowing for as much downward float travel as possible and then refit it. When it fills it may need a tap to release the float again initially but once filled will never be an issue. I did this and it's perfect now, I had it wide open many at time for over 2 years now and have had no issues at all.
TBH I'm glad it did as this carb is really smooth and a joy to use and set up once sorted, so hang in there.

Cheers for the advise, i will give it a try!

As an aside, do you have an air filter on it. Just thinking of air flow to the carb if it's been restricted or blocked somehow? A reason the old series 1 frame breathers were changed was because a coat or luggage was blocking the air intake and they would just cut out.