Yep I’ve cleaned the fuel tank and fitted a new petcock. Fuel is new and clean and have an inline fuel filter fitted.
Looks like the carb must have some crud in it somewhere likely the idle / tip in circuit as said above. Just can’t seem to get it shifted.
It pulls fine past this point to WOT but Four strokes at top speed / WOT which I think is normal with the stock exhaust?
I don’t really want to take the Welch plug off as not sure how to replace without it leaking.
Perhaps ultra sonic would be the best way to shift something buried deep inside the carb?
Appreciate all the help and advice.