Fork Tube Caps - Set/2 - Stock Aluminum type but with No preload adjuster. Caps Fit: 35mm. fork tubes on XS650's 1977-84. Replaces troublesome adjustable US model Cap used on 1978-84 650's Note: Adjustable caps were never used on 650's outside of North America. 22mm. Hex top Caution! Fine thread, use care when installing.