Here's what I got. This thing never ran right from day 1 and I'm tired of it. Do I spend the money on a jet kit or is there a carb I can buy that would be as big as the keihin that will actually work? I finally have my low end rpm smooth and powerful, but when cracking wide open after that it just sputters all over the place. Smooths out when I just maintain speed. Sometimes the idle shoots wAayyyy up after pulling in the clutch. I'm tired of messing with it and really need some advise here. 66 cc gasbike GT8. Thanks guys.