I just went for a ride today and the sled ran fine for about 50 miles. I stopped at a gas station to top it off and about 5 miles after filling up, it started spuddering at about 4000-5000 rpm. For the rest of the ride the engine light flashed and I could only ride about half throttle, any more and it would die out. If any one has any ideas or know what it could be let me know. thanks.