no its running the same as before the carb was cleaned. It just wouldnt stay running before. Now it will stay running but sounds like its at full throdle, its running so hard the frame shakes. There is no black smoke. could the srew with the spring (Idle screw maybe) be to tight? or could the linkage springs be in the wrong place? I just got this go-cart and i think the guy that had it before didnt take real good care of it.