RK EXCEL Chain - 428MXZ1 HD ChainAll components heat treated for higher performance and longer durability. MXZ1 chains are constructed with thicker plates to accommodate current mini bike power. Available in gold racing finish or standard steel finish. MXZ1 chains feature chromoly steel construction with seamless rollers and bushings, and alloy pins for added strength and longer life. MXZ1 chains have a maximum tensile strength of 6,070; approximately 5% stronger than previous MXZ
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