RK Black 530 KS Series Chain and Sprocket Kit. For more than 40 years, RK has been supplying all major Japanese motorcycle manufacturers with original equipment. Even in racing, RK is the first choice of many teams in the MotoGP, the motocross or the Paris-Dakar Rally. 1x Black RK 530 KS Series Chain. Product Type: Chain and Sprocket Kit. Pin Length: 24.9mm. Pin Diameter: 5.24mm. Plate Thickness – Inner: 2.4mm. Plate Thickness – Outer: 2.4mm. Tensile Strength (kgf): 4480kgf. Tensile Strength (kN): 44.8kN. Weight per 100 links: 2.11kg. You can send us a message by using the “Questions and answers” section towards the bottom of the page.