I have an a35 engine with a 70cc alukit with a puch high compression head, the intake is 19 mm on the inside I think, the carburetor is a 21mm Dellorto with a 104 jet, Malossi high flow airfilter, idle screw turned all the way in mixture screw turned all the way in, it won’t idle at all and it won’t revv high as a moped should either. It also takes a bit to revv as high as it does. Believe it or not I think it might be running lean because when I made the mixture richer It revved higher. Should I upjet? I do not want to run it long incase it’s too lean.