Hi, thanks for reply
Yes I did have the popping backfiring issue. Managed to get that sorted by getting a carb gasket and float valve kit
But now, when pulling up at lights etc its over revving. Have tried turning down the stop/idle but revs drop too low and cuts out. There doesnt seem to be any middle setting with it. Will have a go at trying your suggestion of turning the pilot air screw down as when backfiring stopped we returned it back to 3 turns out. Seemed to be ok but when hot its NOT !! Doing my head in lol
Thanks for suggestions, will keep you posted