The new PD Fork Valves give that progressive and controlled feeling of a cartridge fork. Radial computer designed valve housing made of 6061 T6 aluminium for light weight. 65 Rockwell hardened for long life and appearance. Damping adjustable and tuneable to any application. Extremely cost effective. Can be used for On- and Off-Road, Racing and Touring. Fully tested and proven. To suit all models of Hinckley twins.  Professional installation recommended.