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1999 Artic Cat 500 ATV bogs down and backfires


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Only thing I can think of on the simple side would be a dirty carburetor or stuck choke, maybe poor fuel delivery from the tank. 

Second thing would be electrical. The spark could be breaking down so it could be a bad rectifier or ignition coil, maybe water inside the kill switch or ignition switch, a break in the wire harness maybe where you have an intermittent short. You can do some easy testing  on some of the electrical  parts other then the cdi. 
 

lastly I would check the timing to make sure it hasn’t jumped a tooth or two on the cam sprocket.  Based on the backfiring it’s a symptom of timing but hit the simple stuff first before you start digging deep.  

Honestly and I don’t want to sound repetitive we have had members here that swore the gas was fine and the plug was good and after a second look it turned out to be just that.  
Hopefully this helps you out. 
 


 

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