The K-FORK Kit has been developed by our R&D Department, to trasfmorm the original road front fork into an high-performance suspension unit, with components used in the racing Forks. The Kit increases the front stability, improves the braking characteristics, and the riding in the curves. The Kit KFORK contains: Billed Ergal pistons diameter 20 or 24 mm (according to the application)for Rebound and Compression Fluxed passage holes with centesimal tolerance Pyramid shims packs with degressive and linear damping Sealing band with high sliding performances Synt Oil at very low viscosity, developed in collaboration with FUCHS - Silkolene, for a perfect consistency of performance Packaging contens detailed instructions, with attached shims chart. Compatible with: - Yamaha: R1 04-06_M