Make your trusty Sportster look like Jay Springsteen’s XR750 dirt track race bike. These fiberglass reproduction parts are universal use and designed after the facory’s race department components. Since XR750 frames had a very skinny (1") backbone tube the original XR750 tank would not fit onto the stock Sportster frame (1.65"), hence the Airtech tanks feature a redesigned tunnel to fit a standard Sportster frame. However the outside apperance exactly meets the original XR750 shape. You will need to weld two tabs to the frame for the stud mounts. The rear of the tank has an insert so you can attach a bracket or hold down strap.