They are preload adjustable to tune them in to your weight for the best handling

reliability

Securely mount a Fuel Reserve Bottle to your motorcycle in moments using a ballistic nylon or leather Reserve Bottle Carrier

which includes 928

and chisel attacks

1/4 inch NPT Mini Petcock Straight Outlet - No Reserve Brand_No School Choppers They are preload adjustable toThese 1 4" NPT mini petcocks have no reserve and feature a solid on off ball valve for a long, reliable life. These small petcocks tuck up under your gas tank for a real clean look. Features a 1 4" NPT thread on one end and a 1 4" hose barb on the other. Rugged steel construction with Zinc plating. Viton O ring stands up to most commonly used fuels. Sold individually.