It is more like two – A tiny low speed carburetor runs off a rotary valve drilled into the center main bearing. The high speed carburetor is split. One side feeding the upper rotary valve for the top pare of cylinders and the other side feeding the rotary valve for the bottom pare. Fuel leakage is usually a bad float or one that is set too high – OR a leaking float valve (dirt or corrosion) OR bad fuel line connections. You can only tighten the fuel lines so much, then you have to replace them . . . 😉
