For all models with 41mm Showa Forks late 1977-later. The progressively wound springs are specially designed to resist bottoming out at the end of the fork's travel. The stock bottoming out point is retained so clearance between the frame and ground,and front fender to the frame, is unaffected. Complete with insturctions. Will lower the forks 1 1/4 or 2 inches depending on spacers used. Manufacturer