I have a 1993 Arctic Cat 580 EXT. I went for a ride Saturday night and after a while it began to bog way down, to the point it actually stopped moving. After a little easing with the throttle, it began riding again and I went on my way, easing with the throttle. Then after a couple hours of riding, she began to run like it used to, I could run it wide open and have no problems, though it still wouldn't reach max speed. After a couple hours of decent riding, it started bogging again right before I ran out of gas. Do I have a fuel problem? And what else should I check?