BOLD MAGENTA part numbers are new for 2025 CHAINS & DRIVE BELTS PARTS-UNLIMITED.COM STREET | 2025 1099 CONNECTING LINKS DESCRIPTION PART # 520 FB O-RING Repl. clip connecting link 1225-0056 NO. OF LINKS PART # 100 1222-0099 NO. OF LINKS PART # 110 1222-0100 NO. OF LINKS PART # 114 1222-0101 NO. OF LINKS PART # 116 1222-0102 NO. OF LINKS PART # 120 1222-0103 520 FB CHAIN • This is the top of the line; the strongest, most durable sealed chain that we offer • FB = Fine Blanking, an incredibly precise manufacturing process that yields perfectly cut links • Tight tolerances make the plate, pin and bushing union accurate and strong •Due to the accuracy of the cuts and the use of stronger alloyed steel, the FB has our highest tensile strength rating, nearly 8,000 lb. •Special sealing rings are chemically treated to gain strength and reduce friction •The FB treatment allows the O-rings to be impregnated with grease •FB rings are stronger and more durable than X-rings, with significantly less friction • Gold links and rollers, silver inner plates, pins and bushings •Clip-type connecting link included •Recommended for applications 450cc and above •Replacement connecting link available CONNECTING LINKS DESCRIPTION PART # 520 HPO O-RING Repl. clip connecting link M573-00-01 NO. OF LINKS PART # 84 M573-00-84 86 M573-00-86 88 M573-00-88 NO. OF LINKS PART # 90 M573-00-90 96 M573-00-96 100 M573-00-100 NO. OF LINKS PART # 110 M573-00-110 112 M573-00-112 114 M573-00-114 NO. OF LINKS PART # 116 M573-00-116 120 M573-00-120 124 1222-0721 520 HPO O-RING CHAIN •O-ring chain •Extra-high-tensile-strength link plates •Rust-resistant nickel-plated side plates •Vacuum-injected greased chain •Solid bushings •Recommended for applications between 350 to 450cc •Clip-type connecting link included •Replacement connecting link available CONNECTING LINKS DESCRIPTION PART # 520 RXP PRO-MX Repl. clip connecting link M574-00-01 NO. OF LINKS PART # 96 M574-00-96 100 M574-00-100 110 M574-00-110 NO. OF LINKS PART # 112 M574-00-112 114 M574-00-114 116 M574-00-116 NO. OF LINKS PART # 120 M574-00-120 124 1222-0722 520 RXP PRO-MX CHAIN •Non-O-ring chain •Designed specifically for motocross racing applications •High-tensile-strength nickel-plated inner link plates •High-tensile rust-resistant gold-plated side plates •High application greased chain •Recommended for applications between 125 to 350cc •Clip-type connecting link included •Replacement connecting link available
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