Yamaha - Float Chamber Assembly Carburetor Fuel System 6EK-14180-00-00. Overview. When a carburetor starts acting up, a lot of times it comes back to the float chamber not holding fuel the way it should. I've worked on enough Yamahas to know that chasing small parts can waste time-sometimes it's better to swap the whole assembly and be done with it. This is the part that keeps fuel levels consistent before it ever reaches the engine. When it's right, the motor idles clean and runs steady without