Replace a failing fuel valve or add high flow capability with the best fuel tank petcock valves at great prices from J&P Cycles. A motorcycle petcock is typically situated at the bottom of a fuel tank and allows the rider to switch from the main source of gasoline to the reserve or turn the fuel flow completely off. In many bikes, this valve can be the key to making it to the next gas station before you run out of fuel. Pick up a signature J&P Cycles petcock or shop brands like ACCEL, Biker's Choice, Pingel, V-Twin Manufacturing and more. While you're working on your fuel system, check out our Motorcycle Fuel Lines and Motorcycle Fuel Line Components to get everything you need to get the job done.