Yamaha - Float Chamber Assembly Carburetor Component 6D8-14180-41-00. Overview. This float chamber assembly is one of those parts you don't think about until your engine starts acting up at idle or loading up with fuel. It plays a steady, behind-the-scenes role in keeping the right fuel level inside the carburetor so everything runs smooth and predictable. When it's working right, your motor starts clean, idles steady, and transitions without hesitation. When it's not, you'll feel it immediately