BOLD MAGENTA part numbers are new for 2026 PARTS-UNLIMITED.COM 2026 | STREET CHAINS & DRIVE BELTS 1054 520MXZ5 - CUT-TO-LENGTH OR BULK NO. OF LINKS GB520MXZ5 GOLD PART # 114 1221-0422 116 1221-0423 NO. OF LINKS GB520MXZ5 GOLD PART # 120 1221-0424 Clip connecting link 1225-0767 HEAVY-DUTY CHAINS (MXZ/MXZ1/MXZ4/MXZ5) •Made for the serious motocross racer with all components heat-treated for high performance and durability •Features chromoly steel construction with seamless rollers and bushings, and oversized alloy pins for added strength •MXZ5 is the lightest and strongest MX chain on the market with an impressive tensile strength and a weight of only 3.06 lbs. •Ideal for professional level from 80cc to 500cc open class racing •Chains include clip connecting link •420MXZ – Made for street and dirt bikes up to 150cc and a maximum tensile strength of 4,980 lbs. •420MXZ4 – Made for dirt bikes up to 150cc and a maximum tensile strength of 4,980 lbs. •428MXZ1 – Made for street and dirt bikes up to 150cc and maximum tensile strength of 6,070 lbs. •428MXZ4 – Made for dirt bikes up to 150cc and maximum tensile strength of 6,400 lbs. •520MXZ5 – Made for street and dirt bikes up to 500cc and a maximum tensile strength of 8,500 lbs. 420MXZ - CUT-TO-LENGTH NO. OF LINKS 420MXZ GOLD PART # 420MXZ NATURAL PART # 82 RK420MXZ82 - 100 RK420MXZ100 - 104 RK420MXZ104 - 110 RK420MXZ110 - 114 RK420MXZ114 - 118 RK420MXZ118 - NO. OF LINKS 420MXZ GOLD PART # 420MXZ NATURAL PART # 120 RK420MXZ120 1220-0341 124 RK420MXZ124 - 126 RK420MXZ126 1220-0343 130 RK420MXZ130 - 132 RK420MXZ132 - Clip connecting link R18422MXZ 1225-0333 420MXZ4 - CUT-TO-LENGTH NO. OF LINKS PART # 120 1221-0263 134 1221-0264 Clip connecting links 1225-0528 428MXZ1 - CUT-TO-LENGTH NO. OF LINKS 428MXZ1 NATURAL PART # GB428MXZ1 GOLD PART # 100 1221-0471 110 - 1221-0472 116 - 1221-0474 118 - 1221-0475 120 1221-0469 1221-0476 124 - 1221-0477 NO. OF LINKS 428MXZ1 NATURAL PART # GB428MXZ1 GOLD PART # 126 - 1221-0478 130 - 1221-0479 132 - 1221-0480 134 1221-0470 1221-0481 Clip connecting link 1225-0740 1225-0812 428MXZ4 - CUT-TO-LENGTH NO. OF LINKS PART # 120 1221-0265 Clip connecting link 1225-0529
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