Well i just rebuilt my blaster it was running fine for about an hour then it wouldnt hit powerband. So I took the carb apart and found some dirt laying in the bottom of it. So I washed it out and slapped it back on and it was fine and it was running awesome. Then all of a sudden it started idling very very fast. ALmost full throttle. SO i cleaned out the jets with carb cleaner this time and checked if the throttle was sticking and it wasnt. SO i put it back on and it sat there and idled for about 5 minutes then did the same thing again. I cant see what the problem is. I am thinking the float might be sticking. Should I take it to someone that knows what they are doing with a carburetor? I hate messing with them I am always afraid of messing something up. I cant figuire out what the problem is. I am thinking it is a piece of dirt thats cycling around in there.

 

Clean the reeds. Are you running with the airbox still or a K&N clamp on filter?

 

A leak allowing outside air to get into the motor will lean it way out,and make it rev much higher,since it happens after it warms up,look for something that would expand a lot after it heats up, possibly an intake warped,or even an exhaust leak will cause a bad lean condition,and make it rev out of control. I'm no 2 stroke expert,but I know those are 2 of the things that can cause your problem.