Scooterotica

First thing I would do is make sure your throttle cable is seated properly at both ends.

Carb jets removed and all cleaned with compressed air. Seems to be working fine now. Must be the Sainsbury's petrol

You could of blocked the tap with shite if you jacked it up take tank cap of and put air through the petrol pipe to eliminate this

How did you jack it up?

With a car jack from the very back of the scooter

Might seem daft but is the throttle cable outer seated correctly? Sometimes they rest on carb housing and not pushed in right which makes it race.
Gaza