RK 420 MXZ GB Heavy Duty Chain - 134 Links - Gold GB420MXZ4-134Made for the serious motocross racer with all components heat treated for high performance durability Feature chromoly steel construction with seamless rollers and bushings, and oversized alloy pins for added strength MXZ4 is the lightest and strongest MX chain on the market with an impressive tensile strength and a weight of only 2. 89 lb. Ideal for professional level from 80cc to 500cc open class racing Chains include clip connecting link GB 420
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