The Dirt Tricks F1B-14 Front Countershaft Sprocket is a 14-tooth, 520-chain sprocket engineered for demanding off-road and motocross use. 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 provides the strength and durability needed for extended riding seasons while maintaining a lightweight design comparable to aluminum sprockets.
Feature: The Dirt Tricks minimalist sprocket design is engineered to deliver long service life, with strength rated at 2.5 times that of stainless steel. The Diamond Black and Chromatic design approach reduces weight while providing a distinctive finish, and Dirt Tricks Zirconium coating technology helps reduce friction by up to 50 percent while improving durability. The sprocket is backed by a one-year guarantee; if normal use wears it out, Dirt Tricks will replace it.
Feature: This 14-tooth front countershaft sprocket is designed for Yamaha motorcycles using a 520 chain. Fitment includes the 2015–2017 Yamaha YZ250FX and the 2005–2011 Yamaha YZ125. Confirm the motorcycle model year, chain size, and preferred gearing before installation. Manufacturer part number: F1B-14. Vendor part number: 254-16114.
Features:
- 14-tooth front countershaft sprocket for 520 chain applications
- Dirt Tricks tool steel construction engineered for demanding off-road use
- Designed using aerospace steel expertise, heat treatment, and FEA stress analysis
- Minimalist design provides high strength with a lightweight feel comparable to aluminum
- Up to 2.5 times stronger than stainless steel
- Zirconium coating helps reduce friction by up to 50 percent and improves durability
- One-year Dirt Tricks wear guarantee
- Fits 2015–2017 Yamaha YZ250FX and 2005–2011 Yamaha YZ125
- Brand: Dirt Tricks
- Manufacturer part number: F1B-14
- Vendor part number: 254-16114
Fitment:
2001 Yamaha WR250F
2001 Yamaha YZ250F
2002 Yamaha WR250F
2002 Yamaha YZ250F
2003 Yamaha WR250F
2003 Yamaha YZ250F
2004 Yamaha WR250F
2004 Yamaha YZ250F
2005 Yamaha WR250F
2005 Yamaha YZ125
2005 Yamaha YZ250F
2006 Yamaha WR250F
2006 Yamaha YZ125
2006 Yamaha YZ250F
2007 Yamaha WR250F
2007 Yamaha YZ125
2007 Yamaha YZ250F
2008 Yamaha WR250F
2008 Yamaha YZ125
2008 Yamaha YZ250F
2009 Yamaha WR250F
2009 Yamaha YZ125
2009 Yamaha YZ250F
2010 Yamaha WR250F
2010 Yamaha YZ125
2010 Yamaha YZ250F
2011 Yamaha WR250F
2011 Yamaha YZ125
2011 Yamaha YZ250F
2012 Yamaha WR250F
2012 Yamaha YZ125
2012 Yamaha YZ250F
2013 Yamaha WR250F
2013 Yamaha YZ125
2013 Yamaha YZ250F
2014 Yamaha WR250F
2014 Yamaha YZ125
2014 Yamaha YZ250F
2015 Yamaha WR250F
2015 Yamaha YZ125
2015 Yamaha YZ250F
2015 Yamaha YZ250FX
2016 Yamaha WR250F
2016 Yamaha YZ125
2016 Yamaha YZ250F
2016 Yamaha YZ250FX
2017 Yamaha WR250F
2017 Yamaha YZ125
2017 Yamaha YZ250F
2017 Yamaha YZ250FX
2018 Yamaha WR250F
2018 Yamaha YZ125
2018 Yamaha YZ250F
2018 Yamaha YZ250FX
2019 Yamaha WR250F
2019 Yamaha YZ125
2019 Yamaha YZ250F
2019 Yamaha YZ250FX
2020 Yamaha WR250F
2020 Yamaha YZ125
2020 Yamaha YZ125X
2020 Yamaha YZ250F
2020 Yamaha YZ250FX
2021 Yamaha WR250F
2021 Yamaha YZ125
2021 Yamaha YZ125X
2021 Yamaha YZ250F
2021 Yamaha YZ250FX
2022 Yamaha WR250F
2022 Yamaha YZ125
2022 Yamaha YZ125X
2022 Yamaha YZ250F
2022 Yamaha YZ250FX
2023 Yamaha WR250F
2023 Yamaha YZ125
2023 Yamaha YZ125X
2023 Yamaha YZ250F
2023 Yamaha YZ250FX
2024 Yamaha WR250F
2024 Yamaha YZ125
2024 Yamaha YZ125X
2024 Yamaha YZ250F
2024 Yamaha YZ250FX
2025 Yamaha WR250F
2025 Yamaha YZ125
2025 Yamaha YZ125X
2025 Yamaha YZ250F
2025 Yamaha YZ250FX
2026 Yamaha WR250F
2026 Yamaha YZ125
2026 Yamaha YZ125X
2026 Yamaha YZ250F
2026 Yamaha YZ250FX