RKexcel - Chain - GB520MXZ5Lightweight motocross chain 3. 15 lbs per 100 links. Chromized pins for added strength and improved wear resistance. GB520MXZ5 has thicker pins, higher tensile strength and higher rigidity than MXZ4. New grease applied at the factory is not sticky in order to prevent dirt and mud buildup. Ideal for professional level 125cc to 500cc racing. MXZ5 chains have a maximum tensile strength of 8,600 lbs per 100 links 8% higher tensile strength when compared
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