EK's Supreme Quadra-X Ring Chains, The Ideal O.E. Replacement. EK's MVXZ2 Quadra-X Ring chain is the ideal replacement chain for any 1000cc street bike. Features like lightening holes in the sideplates, large-diameter pins, and friction-reducing Quadra-X Rings help ensure high-performance and up to two times increased wear life compared to a standard O-ring chain. For street or dirt use. Maximum displacement: Street - 1000cc; Dirt - 750cc. Tensile strength: 9000 pounds. Standard with rivet-type master link; clip-type (semi-press) or screw-type master links optional and sold separately.