I have a 50cc 2 cycle Arctic Cat ATV, I think it is 2000-2002 model year. My son was riding it around our yard and it started misfiring at an rpm so low it will just barely try and move. I tried cleaning the carb although it really sounds electrical. I had installed an Ebay ignition box that raised the rev limit, I took that off today and put the stock one back on with no help. I took the carb off and pulled the reed valves and they look good and extremely clean. Any advice will be appreciated.

Kurt

 

With the help of LT80 on this forum I found the problem! The ex tip had clogged and would not let the engine breath.

Kurt