Standard ET3, clean carb, standard jetting, fuel pipe sensibly routed. Takes ages for revs to drop and I mean a good deal of time. Engine starts and runs great except for this problem. Its probably simple but its got me stumped.
Manifold n carb are nice n secure also.
PS. my tuned ET3 goes like a bitch now after a D36 needle and 266 atomiser went in (cheers to readspeed for the advice)