1991cr125 wont fire. what should i do?

so i was riding up and down my road and decided to stop and doa good burnout in my uncles old yard. so i got it going and then i got bored with it. so i rode back up the road, turned around, and then the bike died. i took it back to the garage and put it up. at first i thought it was the carburetor since it was pretty darn dirty. then i cleaned it and tried to start it. also since the carb was already out i decided to clean the reeds too. i ordered a new carb boot and gasket. ive got great spark but it wont run. sorry its so long. any help is appreciated