Heres the situation. We go to the track w/ the bike and it starts right up on the first kick no problems (never has had problems starting). Maybe 6 laps around the track...no problems. Out of no where it started acting like it wanted to stall...so it did. Kicked it over once it stalled and it stalled again seconds after. Kicked it over and over...nothing. tried push starting it...nothing. We changed the spark plug w/ a spare...nothing. Drained the gas from the float bowl....nothing. Cleaned the air filter...nothing. We checked to see if it was getting spark and it is. Any input would be greatly appreciated. Thanks fellas p.s. - yes, the bike did have fuel.