This is my first dirt bike. Yesterday I rode it for a couple hours then it ran out of gas. Put some gas in it, and it would not start at all. Last night I checked everything, made sure it was getting gas, cleaned the whole carb, checked the spark, airfilter was clean. Then after I got done putting the gas tank back on, It fired right up. Ran for about 5 minutes, then I shut it off and started it back up again. Now this morning, It won't start again!!! whats causing it to do this?