Was not getting top end speed. When I would depress throttle all the way, the engine and sled would bog down, sometimes backfire and or sputter. Today I removed the carbs from the engine, but left all gas lines and cables in place. I removed the bottom of the carb and cleaned the "bowls" where the floats are. I did not completely disassemble the carbs. I cleaned them with a rag and some brake parts cleaner for lack of proper carb cleaner. After I reassembled the sled and started it up, it revved to max and I lost control of the sled and had to hit kill button to shut the sled down. Anyone have any idea what I did wrong and how to fix it? Thanks.

did you check the idles on the carbs make sure they are all in sync and then make sure your low speed jet isnt blocked