Well i got my 400ex running all good cleaned the carbs twice and set the fuel screw out between 2 1/4 and 2 1/2 turns out but when im in neutral and I give it throttle really fast its bogs and almost shuts off. If I do it slowly it works fine. What do you all think? The gas has been in the tank since november so i dont know if its bad. Any help is appreciated.