ATV High rpm problem?
 

I own a 2005 wolverine 350 and i rode it today and there was a problem. Whenever i reached high rpm it would putt and the power had a big decrease. The quad went much slower than usual and barely ran at high rpm. What is the problem?

bad spark plug, happpens to me alot

I think it might be elevation air pressure, ask a guy at a bike shop how to fix that, it can be dangerous, or it might be a spark plug, check it out.