Bikers Choice Gas Tank Quick Disconnect Coupling 1/4 Single or dual shut-off valves When connected fuel will flow and when disconnected fuel will not flow Use dual shut-off for fuel tanks equipped with a crossover line For fuel supply (fuel tank to carburetor), use the original quickdisconnect couplings with the single shut-off valve Available for 1/4in. and 5/16in. I.D. fuel line