{"product_id":"rk-racing-chain-gb420mxz-100-gold-100-link-heavy-duty-mx-racing-chain","title":"RK Racing Chain GB420MXZ-100 Gold 100 Link Heavy Duty MX Racing Chain","description":"\u003cp\u003eOur review of the GB420MXZ-100 finds it ideal for the serious motocross racer seeking the lightest, strongest non O-ring chain for 50cc to 125cc open class use. The bottom line: this chain delivers class-leading tensile strength and a durable construction without the added weight of O-rings, making it a clear choice when maximum strength-to-weight matters most on race day. Riders who prioritize reliability and long wear life will appreciate the engineering and finish of this specific 100 link version.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eChrome-moly construction:\u003c\/strong\u003e The chrome-moly steel plates and components provide high strength while keeping overall weight low for nimble handling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeamless rollers and bushings:\u003c\/strong\u003e These reduce friction and improve wear life so the chain maintains performance over extended racing use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized alloy pins:\u003c\/strong\u003e Special alloy pins increase shear resistance and deliver a higher maximum tensile strength for hard landings and big torque loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHIT heat treatment:\u003c\/strong\u003e All parts are heat-treated with RK's Heat Induction Transfer process to improve durability and reduce the chance of premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh tensile rating:\u003c\/strong\u003e Rated to 5000 ft-lb tensile strength, the chain is built to withstand professional level stresses in lightweight motocross classes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClip master link:\u003c\/strong\u003e Uses a clip style master link for straightforward installation and field repairs without specialty tools.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe GB420MXZ-100 is aimed at professional and serious amateur riders competing on 50cc to 125cc open class bikes who need a non O-ring chain that sacrifices minimal weight while offering maximum strength. Its light weight and 5000 ft-lb tensile rating make it especially suited to racers who change components for on-track performance and who value longevity under aggressive use.\u003c\/p\u003e\n\u003cp\u003eRiders who prefer sealed O-ring chains for minimal maintenance or who ride heavy displacement street bikes should look elsewhere; this chain is optimized for racing environments where service intervals and dirt exposure are expected parts of ownership.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExceptional strength-to-weight thanks to chrome-moly construction and oversized pins.\u003c\/li\u003e\n\u003cli\u003eDurable heat-treated components that extend wear life for racing applications.\u003c\/li\u003e\n\u003cli\u003eSeamless rollers and bushings reduce friction and help the chain run smoothly over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNon O-ring design requires more frequent cleaning and lubrication compared to sealed chains.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eRK Racing Chain\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eGB420MXZ-100 (420 Series)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLink Count\u003c\/td\u003e\n\u003ctd\u003e100 links\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Tensile\u003c\/td\u003e\n\u003ctd\u003e5000 ft-lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.76 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePin Length\u003c\/td\u003e\n\u003ctd\u003e15.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaster Link Type\u003c\/td\u003e\n\u003ctd\u003eClip\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe GB420MXZ-100 is a focused racing chain that delivers an outstanding balance of light weight and raw strength, making it a strong value for competitive riders in the 50cc to 125cc open classes. Its chrome-moly construction, HIT heat treatment, and robust pins mean fewer failures under race stresses, though riders should be prepared for regular maintenance versus sealed alternatives.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this chain suitable for professional motocross racing?\u003c\/strong\u003e\u003cbr\u003eYes. With a 5000 ft-lb tensile rating and race-oriented construction, this chain is built for professional level 50cc to 125cc open class racing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it use an O-ring seal?\u003c\/strong\u003e\u003cbr\u003eNo. The GB420MXZ is a non O-ring chain designed for the lightest possible weight and maximum strength; it will require routine cleaning and lubrication.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat type of master link is included?\u003c\/strong\u003e\u003cbr\u003eIt uses a clip style master link for easy installation and field repairs.\u003c\/p\u003e","brand":"RK Racing Chain","offers":[{"title":"Default Title","offer_id":48256107217115,"sku":"B0022ZGBUO","price":45.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/61ix4ac5POL._AC_SL1000_b890af87-4a0f-4203-ae43-2939ffd60500.jpg?v=1778270138","url":"https:\/\/gearmusthave.com\/products\/rk-racing-chain-gb420mxz-100-gold-100-link-heavy-duty-mx-racing-chain","provider":"GearMustHave","version":"1.0","type":"link"}