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 use only. Maximum displacement: Street - 1000cc. Tensile strength: 9300 pounds. Standard with rivet-type or clip-type (semi-press) master link.