{"product_id":"dirt-tricks-f1b-13-13-tooth-520-front-countershaft-sprocket-for-yamaha","title":"Dirt Tricks F1B-13 13-Tooth 520 Front Countershaft Sprocket for Yamaha","description":"\u003cp\u003eThe Dirt Tricks F1B-13 Front Countershaft Sprocket is a 13-tooth, 520-chain sprocket engineered for demanding off-road riding. Designed by Dirt Tricks president and engineer Greg Burns, this sprocket reflects extensive expertise in aerospace steels, heat treatment, and finite element analysis. Its tool-steel construction delivers exceptional strength and durability while maintaining a lightweight, minimalist profile comparable to aluminum sprockets.\u003c\/p\u003e\u003cp\u003eBuilt for long service life, the Dirt Tricks F1B-13 sprocket is designed to withstand hard riding and resist wear throughout an entire season. Dirt Tricks sprockets are rated at 2.5 times the strength of stainless steel, providing dependable performance under high-load conditions. The sprocket is backed by Dirt Tricks’ one-year guarantee: if it wears out during the warranty period, Dirt Tricks will replace it.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e This 13-tooth front countershaft sprocket fits select Yamaha motorcycles, including the 2015-2017 Yamaha YZ250FX and 2005-2011 Yamaha YZ125. Verify the motorcycle model, year, chain size, tooth count, and countershaft configuration before installation. The manufacturer is Dirt Tricks, and the manufacturer and vendor part number is F1B-13.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e13-tooth front countershaft sprocket for 520 chain applications\u003c\/li\u003e\n\u003cli\u003eTool-steel construction engineered for high strength and extended wear resistance\u003c\/li\u003e\n\u003cli\u003eDesigned using aerospace steel expertise, advanced heat treatment, and FEA stress analysis\u003c\/li\u003e\n\u003cli\u003eMinimalist design provides strong performance with a lightweight feel comparable to aluminum\u003c\/li\u003e\n\u003cli\u003eRated at 2.5 times stronger than stainless steel\u003c\/li\u003e\n\u003cli\u003eBacked by Dirt Tricks’ one-year wear guarantee\u003c\/li\u003e\n\u003cli\u003eFits 2015-2017 Yamaha YZ250FX and 2005-2011 Yamaha YZ125\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\nFitment:\u003cbr\u003e\n2001 Yamaha WR250F\u003cbr\u003e\n2001 Yamaha YZ250F\u003cbr\u003e\n2002 Yamaha WR250F\u003cbr\u003e\n2002 Yamaha YZ250F\u003cbr\u003e\n2003 Yamaha WR250F\u003cbr\u003e\n2003 Yamaha YZ250F\u003cbr\u003e\n2004 Yamaha WR250F\u003cbr\u003e\n2004 Yamaha YZ250F\u003cbr\u003e\n2005 Yamaha WR250F\u003cbr\u003e\n2005 Yamaha YZ125\u003cbr\u003e\n2005 Yamaha YZ250F\u003cbr\u003e\n2006 Yamaha WR250F\u003cbr\u003e\n2006 Yamaha YZ125\u003cbr\u003e\n2006 Yamaha YZ250F\u003cbr\u003e\n2007 Yamaha WR250F\u003cbr\u003e\n2007 Yamaha YZ125\u003cbr\u003e\n2007 Yamaha YZ250F\u003cbr\u003e\n2008 Yamaha WR250F\u003cbr\u003e\n2008 Yamaha YZ125\u003cbr\u003e\n2008 Yamaha YZ250F\u003cbr\u003e\n2009 Yamaha WR250F\u003cbr\u003e\n2009 Yamaha YZ125\u003cbr\u003e\n2009 Yamaha YZ250F\u003cbr\u003e\n2010 Yamaha WR250F\u003cbr\u003e\n2010 Yamaha YZ125\u003cbr\u003e\n2010 Yamaha YZ250F\u003cbr\u003e\n2011 Yamaha WR250F\u003cbr\u003e\n2011 Yamaha YZ125\u003cbr\u003e\n2011 Yamaha YZ250F\u003cbr\u003e\n2012 Yamaha WR250F\u003cbr\u003e\n2012 Yamaha YZ125\u003cbr\u003e\n2012 Yamaha YZ250F\u003cbr\u003e\n2013 Yamaha WR250F\u003cbr\u003e\n2013 Yamaha YZ125\u003cbr\u003e\n2013 Yamaha YZ250F\u003cbr\u003e\n2014 Yamaha WR250F\u003cbr\u003e\n2014 Yamaha YZ125\u003cbr\u003e\n2014 Yamaha YZ250F\u003cbr\u003e\n2015 Yamaha WR250F\u003cbr\u003e\n2015 Yamaha YZ125\u003cbr\u003e\n2015 Yamaha YZ250F\u003cbr\u003e\n2015 Yamaha YZ250FX\u003cbr\u003e\n2016 Yamaha WR250F\u003cbr\u003e\n2016 Yamaha YZ125\u003cbr\u003e\n2016 Yamaha YZ250F\u003cbr\u003e\n2016 Yamaha YZ250FX\u003cbr\u003e\n2017 Yamaha WR250F\u003cbr\u003e\n2017 Yamaha YZ125\u003cbr\u003e\n2017 Yamaha YZ250F\u003cbr\u003e\n2017 Yamaha YZ250FX\u003cbr\u003e\n2018 Yamaha WR250F\u003cbr\u003e\n2018 Yamaha YZ125\u003cbr\u003e\n2018 Yamaha YZ250F\u003cbr\u003e\n2018 Yamaha YZ250FX\u003cbr\u003e\n2019 Yamaha WR250F\u003cbr\u003e\n2019 Yamaha YZ125\u003cbr\u003e\n2019 Yamaha YZ250F\u003cbr\u003e\n2019 Yamaha YZ250FX\u003cbr\u003e\n2020 Yamaha WR250F\u003cbr\u003e\n2020 Yamaha YZ125\u003cbr\u003e\n2020 Yamaha YZ125X\u003cbr\u003e\n2020 Yamaha YZ250F\u003cbr\u003e\n2020 Yamaha YZ250FX\u003cbr\u003e\n2021 Yamaha WR250F\u003cbr\u003e\n2021 Yamaha YZ125\u003cbr\u003e\n2021 Yamaha YZ125X\u003cbr\u003e\n2021 Yamaha YZ250F\u003cbr\u003e\n2021 Yamaha YZ250FX\u003cbr\u003e\n2022 Yamaha WR250F\u003cbr\u003e\n2022 Yamaha YZ125\u003cbr\u003e\n2022 Yamaha YZ125X\u003cbr\u003e\n2022 Yamaha YZ250F\u003cbr\u003e\n2022 Yamaha YZ250FX\u003cbr\u003e\n2023 Yamaha WR250F\u003cbr\u003e\n2023 Yamaha YZ125\u003cbr\u003e\n2023 Yamaha YZ125X\u003cbr\u003e\n2023 Yamaha YZ250F\u003cbr\u003e\n2023 Yamaha YZ250FX\u003cbr\u003e\n2024 Yamaha WR250F\u003cbr\u003e\n2024 Yamaha YZ125\u003cbr\u003e\n2024 Yamaha YZ125X\u003cbr\u003e\n2024 Yamaha YZ250F\u003cbr\u003e\n2024 Yamaha YZ250FX\u003cbr\u003e\n2025 Yamaha WR250F\u003cbr\u003e\n2025 Yamaha YZ125\u003cbr\u003e\n2025 Yamaha YZ125X\u003cbr\u003e\n2025 Yamaha YZ250F\u003cbr\u003e\n2025 Yamaha YZ250FX\u003cbr\u003e\n2026 Yamaha WR250F\u003cbr\u003e\n2026 Yamaha YZ125\u003cbr\u003e\n2026 Yamaha YZ125X\u003cbr\u003e\n2026 Yamaha YZ250F\u003cbr\u003e\n2026 Yamaha YZ250FX","brand":"DIRT TRICKS","offers":[{"title":"Default Title","offer_id":67551234523371,"sku":"254-16113","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/05c0-6165d321179c0_3eafe42e-d58a-4ed1-9830-744e31634efd.png?v=1790716594","url":"https:\/\/ctracingservices.com\/products\/dirt-tricks-f1b-13-13-tooth-520-front-countershaft-sprocket-for-yamaha","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}