BOLD MAGENTA part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | OFFROAD CHAINS CHAINS 746 SS428MXR1 WORKS 428 MOTOCROSS/ OFFROAD RACING CHAINS •Deep gold side plates and gold inner plates •Super-strong and lightweight design for high-performance/racing mini off-road and motocross machines • Utilizes TST (TripleStar Treated) ultra-hard pins and 100% heat-treated components for high strength and durability •Uses clip-type connecting link •Has a tensile strength of approximately 6,070 lbs. •Seamless rollers and bushings help provide the added life and durability REPLACEMENT LINK DESCRIPTION PART # 428MXR repl. clip-type connecting link 1225-0761 NO. OF LINKS PART # 134 1220-0474 SS520MXR2 520 WORKS MOTOCROSS/ OFFROAD RACING CHAINS •Extra-deep gold inner and outer side plates •All components are 100% heat-treated • Super-light, comes in just under 3.6 lbs. for 120 links • Oversized,TST (TripleStar Treatment) coated ultra-hard pins for added strength and unbeatable durability •Built to handle the demands of the top level MX racers in the world •Uses clip-type connecting link •Perfect for any MX applications 125cc through 500cc NO. OF LINKS PART # 116 1220-0475 NO. OF LINKS PART # 120 1220-0476 REPLACEMENT LINK DESCRIPTION PART # Clip type 1225-0763 CHAIN TYPE RING TYPE TENSILE STRENGTH (LBS.) HEAVY-DUTY 520HDN None 7,900 CHAIN TYPE RING TYPE TENSILE STRENGTH (LBS.) WORKS 428MXR - 6,070 CHAIN TYPE RING TYPE TENSILE STRENGTH (LBS.) WORKS (CONT) 520MXR1 - 8,600 CHAIN SPECIFICATIONS DESCRIPTION PART # REPLACEMENT CONNECTING LINK Clip-type 1225-0762 NO. OF LINKS PART # 114 1221-0419 120 1221-0420 520 HEAVY-DUTY NON-SEALED OFFROAD MOTORCYCLE CHAINS • Cost-effective, high-quality, non-sealed chain •Zero compromise in performance or reliability •Great for any offroad/MX motorcycle up to 250cc •Uses clip-type connecting link
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