{"product_id":"chain-tensioner-for-mx350-mx400-dirt-rocket-119-237","title":"Chain Tensioner for Razor MX350, MX400 Dirt Rocket \/ RSF350","description":"\u003cp\u003eRestore proper chain alignment and prevent dangerous derailments with this \u003cstrong\u003eUniversal Parts Replacement Chain Tensioner Assembly\u003c\/strong\u003e. Specifically engineered for the \u003cstrong\u003eRazor Dirt Rocket\u003c\/strong\u003e and \u003cstrong\u003eElectric Sport Bike\u003c\/strong\u003e series, this spring-loaded tensioner automatically maintains optimal chain tautness across rough terrain, protecting your motor sprocket and rear drive assembly from premature wear.\u003c\/p\u003e\u003cp\u003eA failing or bent chain tensioner causes excessive chain slap, decreases battery efficiency, and can cause the chain to jump off completely during sudden acceleration.\u003c\/p\u003e\u003ch3\u003eProduct Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect OEM Specification Match:\u003c\/strong\u003e Manufactured to match the exact fit and spring rate of Razor factory part number W15128050079.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Heavy-duty steel bracket arms and a high-density composite roller wheel engineered to withstand dirt, mud, and vibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Setup:\u003c\/strong\u003e Arrives as a unified bracket assembly ready to mount directly into the factory chassis bracket.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number (MPN):\u003c\/strong\u003e W15128050079\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Dynamic Spring-Loaded Roller Tensioner\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Zinc-plated steel housing with an impact-resistant composite roller.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware Note:\u003c\/strong\u003e Reuses factory frame mounting bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eModel Fitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eThis replacement assembly is verified for all manufacturing versions (Versions 1+) of the following Razor electric platforms:\u003c\/p\u003e\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background-color: #f8f8f8;\"\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eVehicle Series\u003c\/th\u003e\n\u003cth style=\"text-align: left; padding: 10px; border: 1px solid #ddd;\"\u003eSpecific Model Applications (Version 1+)\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eRazor Dirt Rocket\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eMX350 Dirt Rocket, MX400 Dirt Rocket (All Colors\/Variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eRazor Electric Sport\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 10px; border: 1px solid #ddd;\"\u003eRSF350 Electric Sport Bike\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp style=\"margin-top: 15px;\"\u003e\u003cstrong\u003eTech Tip:\u003c\/strong\u003e While replacing the tensioner, always inspect your rear wheel alignment and check your chain for stiff links or excessive stretching. A worn-out chain will continue to jump even with a brand-new tensioner installed.\u003c\/p\u003e\u003cp style=\"margin-top: 15px;\"\u003e\u003ca href=\"https:\/\/www.p65warnings.ca.gov\" target=\"_blank\"\u003eCalifornia Prop 65 Warning\u003c\/a\u003e\u003c\/p\u003e","brand":"Universal Parts","offers":[{"title":"Default Title","offer_id":49985950253336,"sku":"119-237","price":10.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0782\/1728\/1816\/files\/453828.jpg?v=1744826681","url":"https:\/\/www.scooterworks.com\/products\/chain-tensioner-for-mx350-mx400-dirt-rocket-119-237","provider":"Scooterworks USA, LLC","version":"1.0","type":"link"}