ok guys im in need of some knowledge. i have my kart partially assembled and had it up on jackstands and turned the motor on, the rear was off the ground, the torque converter woulnt quite go into a neutral state so i assume i need to loosen the belt a little bit. no big deal. but the motor did not respond to me hitting the throttle at all, but the choke did wonders! i am puzzled by this. also, it backfired a good bit when idling after it got hot. is this probably due to the kart being off the ground? Thank you for your help.