Harley Davidson & Custom Motorcycle High Flow Fuel/Gas Petcock Valves are avialable in many different sizes and finishes in this extensive section. Please be sure to read through the description of the petcock you will view. In the "Item Description" towards the bottom it explains the years, makes and models of Harley Davidson each petcock fits. Fuel Petcock's also fit many after market custom gas tanks for choppers, bobbers, pro street, and custom motorcycles. Sizing, direction and flow will vary from model to model.