well i was riding it for like 30 mins. then shut it off, and all of a sudden i noticed the rpm was wanting to stick when i was in gear. so i shut it off and it didnt want to start after that. i got it started but when i revved it up, the rpm wanted to stay where i let off. and if i tried tapping the throttle again it would rap out really high. or if i just put it at kind of a high rpm, after a few seconds it would just rev up really high! so today i took the carb off and cleaned it all out with brake cleaner and put it back together and it still did the same thing. the idle screw under the seat made a difference if turned. i tore apart the TORS stuff on top of the carb made sure it wasnt dirty, and put it back together, and it didnt rev on its own. but then if we changed the idle screw it would rev up on its own again. it also is still very doggy at low rps.