I was ridin around today for about a 1/2hr-45 minutes when all the sudden my 4-wheeler(2000 Arctic Cat 300 4x4) just bogged out when I gave it gas. The only way I could get it to move was by putting the choke on full. Even then it would only allow so much throttle. When it idled it sounded perfectly fine and the plug wasn't fouled/bad either. Anyone have a clue of what's goin on??