It will start perfectly and idle when when I put it on a stand but when I put it on the ground it does not start it will for like 2 seconds then it will backfire I think it has something to do with the torque converter because the bike tire does not like to roll on the ground and when I start it in my stand the back tire spins at idle idk what else to do I put a 115 jet in my carb and been messing with the idle and air mixture screw I even tried putting another spacer on the torque converter what do I do!!