{"product_id":"jt-sprockets-jtf1905-13-2018-2021-ktm-85-sx-husqvarna-tc85-13t-front-countershaft-sprocket","title":"JT Sprockets JTF1905.13 2018-2021 KTM 85 SX \/ Husqvarna TC85 13T Front Countershaft Sprocket","description":"\u003cp\u003e\u003cb\u003eJT Sprockets — Eliminating Drivetrain Power Loss and Premature Chain Wear with High-Tensile Chromoly Steel\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eStop risking critical case damage and unneeded race-day drama with worn-out front sprockets that strip out or wear down prematurely. A degraded countershaft sprocket causes sloppy chain engagement, accelerating wear on your entire drivetrain and robbing the engine of efficient rear-wheel power delivery. This high-precision 13-tooth front sprocket eliminates power-robbing drivetrain friction, providing a robust mechanical solution that keeps your power transfer seamless and predictable track after track.\u003c\/p\u003e\n\u003cp\u003eEvery JT countershaft sprocket is manufactured using premium SCM420 chromoly steel alloy and heat-treated to exact specifications to deliver absolute Factory Quality performance. Built to withstand structural stresses under intense motocross racing conditions, this sprocket ensures perfect structural synergy with standard pitch racing chains. The advanced heat-treatment process creates an incredibly hard outer layer that maximizes durability while maintaining an optimal core density to eliminate brittle fracturing under high torque loads.\u003c\/p\u003e\n\u003ch3\u003eBundle Components\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eJT Sprockets Front Countershaft Sprocket (MPN: JTF1905.13):\u003c\/b\u003e Features a computer-designed 13-tooth configuration machined from SCM420 chromoly steel with a natural finish for exact tolerances.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey Performance Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eFactory Quality Strength:\u003c\/b\u003e SCM420 chromoly steel alloy construction delivers excellent structural resistance to teeth deformation and rounding.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComputer-Designed Tolerance:\u003c\/b\u003e Precise manufacturing guarantees exact hub fitment, preventing countershaft spline wear and wobble.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eOptimized Tooth Profile:\u003c\/b\u003e Specially engineered tooth configurations enhance chain entry and exit dynamics, maximizing rotational efficiency.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAdvanced Induction Hardening:\u003c\/b\u003e Proprietary heat-treatment ensures extended component longevity under severe mud and sand track conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eSystem Synergy Alignment:\u003c\/b\u003e Reduces secondary wear patterns on rear sprockets and drive chains by ensuring dead-on alignment tracking.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cb\u003eMoto-House MX Pro Tip:\u003c\/b\u003e\u003c\/p\u003e\n\u003cp\u003eWhen installing a new front countershaft sprocket, never use a worn drive chain or reuse a bent locking washer. Ensure the countershaft splines are thoroughly cleaned and free of debris before sliding the sprocket into position. Always utilize a high-quality thread-locking compound on the fixing bolt and torque it precisely to factory specifications. Changing your front sprocket regularly protects your expensive engine cases from catastrophic failures caused by chain derailment or breakages.\u003c\/p\u003e\n\u003ch3\u003eCombined Fitment Table\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border: 1px solid #ddd;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #f2f2f2; text-align: left;\"\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMake\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eYear Fitment\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHusqvarna\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTC85 (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHusqvarna\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTC85 (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHusqvarna\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTC85 (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eHusqvarna\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTC85 (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e85 SX (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2018\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e85 SX (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2019\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e85 SX (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eKTM\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e85 SX (All Wheel Sizes)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eFAQ Questions\u003c\/h3\u003e\n\u003cp\u003eQ) \u003cb\u003eWill this front sprocket fit both standard and big wheel editions of the 85cc models?\u003c\/b\u003e\u003cbr\u003eA) Yes, this sprocket is fully compatible with both standard (17\/14) and big wheel (19\/16) configurations for the listed models and years.\u003c\/p\u003e\n\u003cp\u003eQ) \u003cb\u003eWhat material is used to construct this countershaft sprocket?\u003c\/b\u003e\u003cbr\u003eA) This sprocket is engineered using SCM420 chromoly steel alloy, delivering specialized structural hardness and durability that matches performance demands.\u003c\/p\u003e\n\u003cp\u003eQ) \u003cb\u003eShould I replace my drive chain at the same time I install this new sprocket?\u003c\/b\u003e\u003cbr\u003eA) For optimal system synergy and to prevent premature wear on your brand new sprocket teeth, we highly recommend inspecting and replacing your chain if it shows stretching or structural stiffness.\u003c\/p\u003e\n\u003cdiv style=\"margin: 20px 0; padding: 10px 0; border-top: 1px solid #eee; border-bottom: 1px solid #eee;\"\u003e\n\u003cspan style=\"margin-right: 15px;\"\u003e\u003ca href=\"\/search?q=KTM+85+SX+Drive+Chain\"\u003eKTM 85 SX Drive Chains\u003c\/a\u003e\u003c\/span\u003e \u003cspan style=\"margin-right: 15px;\"\u003e\u003ca href=\"\/search?q=Husqvarna+TC85+Rear+Sprocket\"\u003eHusqvarna TC85 Rear Sprockets\u003c\/a\u003e\u003c\/span\u003e \u003cspan\u003e\u003ca href=\"\/search?q=KTM+85+SX+Countershaft+Seal\"\u003eKTM 85 SX Countershaft Seals\u003c\/a\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003cb\u003eMoto-House MX – Choice of Champions\u003c\/b\u003e – is located in Clermont\/Montverde, FL. We are the best motocross shop in Central Florida with lightning-fast shipping.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"JT Sprockets","offers":[{"title":"Default Title","offer_id":41025846083667,"sku":"JTF1905.13","price":10.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/jt-front-steel-sprocket-13t-428-jtf190513-husqvarna-tc-85-ktm-85-sx-and-gas-gas-mc-85-185221.jpg?v=1735344540","url":"https:\/\/motohousemx.com\/products\/jt-sprockets-jtf1905-13-2018-2021-ktm-85-sx-husqvarna-tc85-13t-front-countershaft-sprocket","provider":"Moto-House MX","version":"1.0","type":"link"}