Manufactured using finest grade of C49 high carbon steel - Yamaha WR 250 F (2014, 2010, 2011, 2012, 2013, 2018, 2007, 2009, 2016, 2017, 2008, 2015, 2020, 2019); Yamaha YZ 250 (2015, 2018, 2014, 2008, 2021, 2009, 2012, 2025, 2005, 2011, 2022, 2006, 2016, 2024, 2010, 2013, 2017, 2019, 2020, 2007, 2023); Yamaha YZ 250 F (2014, 2013, 2016, 2021, 2017, 2023, 2012, 2015, 2018, 2020, 2024, 2019, 2022); Yamaha YZ 250 X (2020, 2024, 2016, 2021, 2025, 2017, 2019, 2022, 2023, 2018); Yamaha WR 450 F (2003, 2005, 2006, 2013, 2014, 2007, 2025, 2008, 2015, 2024, 2010, 2004, 2017, 2018, 2009, 2011, 2012, 2019, 2023, 2016, 2020, 2021, 2022); Yamaha YZ 450 FX (2019, 2022, 2018, 2020, 2023, 2017, 2016, 2021, 2024); Yamaha YZ 125 X (2020, 2025, 2021, 2023, 2024, 2022)