A Harley-Davidson fuel petcock is a valve responsible for controlling the flow of gasoline from your gas tank to your carburetor. Whether you're replacing a failing one or building the bike of your dreams, J&P Cycles has you covered with a full selection of petcocks. As you choose one for your Harley, you'll want to pay attention to the size of your tank bung as they can fit several different NPT (national pipe thread) sizes. You can also choose different fuel outlet configurations in a Harley-Davidson, including straight, right and left hand side. We only stock elite brands you can trust for the long haul like Biker's Choice, Motion Pro, Paughco, Pingel, and V-Twin Manufacturing. Don't miss out on more quality parts for your bike like Harley Petcock Components and Harley Carburetor Rebuild Kits right here at jpcycles.com.