The Dirt Tricks CR-51-RAW Rear Sprocket is a 51-tooth chromoly sprocket designed for select Honda off-road and motocross motorcycles using a 520 chain. Developed by Dirt Tricks president and engineer Greg Burns, this sprocket reflects the company’s expertise in aerospace-grade steels, advanced heat treatment, and finite element analysis. Its minimalist design delivers a strong, lightweight alternative to conventional steel sprockets while supporting dependable performance during demanding riding.
Built for long service life, the Dirt Tricks CR-51-RAW is engineered to be approximately 2.5 times stronger than stainless steel. The raw chromoly construction provides a durable foundation for riders who need reliable chain engagement, consistent power transfer, and resistance to wear. Dirt Tricks backs its rear sprockets with a two-year guarantee and will replace the sprocket if it wears out within the covered period.
Fitment includes the 2017 Honda CRF450RX; 2018 Honda CRF450R, CRF450RX, and CRF250R; 2019 Honda CRF450R, CRF450RX, CRF450X, CRF250R, CRF450R W.E., and CRF250RX. Verify the motorcycle model, chain size, tooth count, and existing drivetrain configuration before installation. The manufacturer part number is CR-51-RAW, and the vendor part number is 254-120151W.
Features:
- 51-tooth chromoly rear sprocket for 520 chain applications
- Designed by Dirt Tricks using aerospace steel expertise, heat treatment, and FEA stress analysis
- Minimalist design provides high strength with weight comparable to aluminum sprockets
- Approximately 2.5 times stronger than stainless steel
- Raw finish offers a durable, functional appearance
- Covered by Dirt Tricks' two-year wear guarantee
- Fits select 2017-2019 Honda CRF motocross and off-road models
- Manufacturer Part Number: CR-51-RAW
- Vendor Part Number: 254-120151W
Fitment:
1983 Honda CR125R
1984 Honda CR125R
1984 Honda CR250R
1984 Honda CR500R
1985 Honda CR125R
1985 Honda CR250R
1985 Honda CR500R
1986 Honda CR125R
1986 Honda CR250R
1986 Honda CR500R
1987 Honda CR125R
1987 Honda CR250R
1987 Honda CR500R
1988 Honda CR125R
1988 Honda CR250R
1988 Honda CR500R
1989 Honda CR125R
1989 Honda CR250R
1989 Honda CR500R
1990 Honda CR125R
1990 Honda CR250R
1990 Honda CR500R
1991 Honda CR125R
1991 Honda CR250R
1991 Honda CR500R
1992 Honda CR125R
1992 Honda CR250R
1992 Honda CR500R
1993 Honda CR125R
1993 Honda CR250R
1993 Honda CR500R
1994 Honda CR125R
1994 Honda CR250R
1994 Honda CR500R
1995 Honda CR125R
1995 Honda CR250R
1995 Honda CR500R
1996 Honda CR125R
1996 Honda CR250R
1996 Honda CR500R
1996 Honda XR250R
1996 Honda XR400R
1997 Honda CR125R
1997 Honda CR250R
1997 Honda CR500R
1997 Honda XR250R
1997 Honda XR400R
1998 Honda CR125R
1998 Honda CR250R
1998 Honda CR500R
1998 Honda XR250R
1998 Honda XR400R
1999 Honda CR125R
1999 Honda CR250R
1999 Honda CR500R
1999 Honda XR250R
1999 Honda XR400R
2000 Honda CR125R
2000 Honda CR250R
2000 Honda CR500R
2000 Honda XR250R
2000 Honda XR400R
2000 Honda XR650R
2001 Honda CR125R
2001 Honda CR250R
2001 Honda CR500R
2001 Honda XR250R
2001 Honda XR400R
2001 Honda XR650R
2002 Honda CR125R
2002 Honda CR250R
2002 Honda CRF450R
2002 Honda XR250R
2002 Honda XR400R
2002 Honda XR650R
2003 Honda CR125R
2003 Honda CR250R
2003 Honda CRF150F
2003 Honda CRF230F
2003 Honda CRF450R
2003 Honda XR250R
2003 Honda XR400R
2003 Honda XR650R
2004 Honda CR125R
2004 Honda CR250R
2004 Honda CRF150F
2004 Honda CRF230F
2004 Honda CRF250R
2004 Honda CRF250X
2004 Honda CRF450R
2004 Honda XR250R
2004 Honda XR400R
2004 Honda XR650R
2005 Honda CR125R
2005 Honda CR250R
2005 Honda CRF150F
2005 Honda CRF230F
2005 Honda CRF250R
2005 Honda CRF250X
2005 Honda CRF450R
2005 Honda CRF450X
2005 Honda XR650R
2006 Honda CR125R
2006 Honda CR250R
2006 Honda CRF150F
2006 Honda CRF230F
2006 Honda CRF250R
2006 Honda CRF250X
2006 Honda CRF450R
2006 Honda CRF450X
2006 Honda XR650R
2007 Honda CR125R
2007 Honda CR250R
2007 Honda CRF150F
2007 Honda CRF230F
2007 Honda CRF250R
2007 Honda CRF250X
2007 Honda CRF450R
2007 Honda CRF450X
2007 Honda XR650R
2008 Honda CRF150F
2008 Honda CRF230F
2008 Honda CRF250R
2008 Honda CRF250X
2008 Honda CRF450R
2008 Honda CRF450X
2009 Honda CRF150F
2009 Honda CRF230F
2009 Honda CRF250R
2009 Honda CRF250X
2009 Honda CRF450R
2009 Honda CRF450X
2010 Honda CRF150F
2010 Honda CRF230F
2010 Honda CRF250R
2010 Honda CRF250X
2010 Honda CRF450R
2010 Honda CRF450X
2011 Honda CRF150F
2011 Honda CRF230F
2011 Honda CRF250R
2011 Honda CRF250X
2011 Honda CRF450R
2011 Honda CRF450X
2012 Honda CRF150F
2012 Honda CRF230F
2012 Honda CRF250R
2012 Honda CRF250X
2012 Honda CRF450R
2012 Honda CRF450X
2013 Honda CRF150F
2013 Honda CRF230F
2013 Honda CRF250R
2013 Honda CRF250X
2013 Honda CRF450R
2013 Honda CRF450X
2014 Honda CRF150F
2014 Honda CRF230F
2014 Honda CRF250R
2014 Honda CRF250X
2014 Honda CRF450R
2014 Honda CRF450X
2015 Honda CRF150F
2015 Honda CRF230F
2015 Honda CRF250R
2015 Honda CRF250X
2015 Honda CRF450R
2015 Honda CRF450X
2016 Honda CRF150F
2016 Honda CRF230F
2016 Honda CRF250R
2016 Honda CRF250X
2016 Honda CRF450R
2016 Honda CRF450X
2017 Honda CRF150F
2017 Honda CRF230F
2017 Honda CRF250R
2017 Honda CRF250X
2017 Honda CRF450R
2017 Honda CRF450RX
2017 Honda CRF450X
2018 Honda CRF230F
2018 Honda CRF250R
2018 Honda CRF250X
2018 Honda CRF450R
2018 Honda CRF450RX
2018 Honda CRF450X
2019 Honda CRF230F
2019 Honda CRF250R
2019 Honda CRF250RX
2019 Honda CRF250X
2019 Honda CRF450R
2019 Honda CRF450R W.E.
2019 Honda CRF450RX
2019 Honda CRF450X
2020 Honda CRF250R
2020 Honda CRF250RX
2020 Honda CRF250X
2020 Honda CRF450R
2020 Honda CRF450R W.E.
2020 Honda CRF450RX
2020 Honda CRF450X
2021 Honda CRF250R
2021 Honda CRF250RX
2021 Honda CRF250X
2021 Honda CRF450R
2021 Honda CRF450R W.E.
2021 Honda CRF450RX
2021 Honda CRF450X
2022 Honda CRF250R
2022 Honda CRF250RX
2022 Honda CRF450R
2022 Honda CRF450R W.E.
2022 Honda CRF450RX
2022 Honda CRF450X
2023 Honda CRF250R
2023 Honda CRF250RX
2023 Honda CRF450R
2023 Honda CRF450R W.E.
2023 Honda CRF450RX
2023 Honda CRF450X
2024 Honda CRF250R
2024 Honda CRF250RX
2024 Honda CRF450R
2024 Honda CRF450R W.E.
2024 Honda CRF450RX
2024 Honda CRF450X
2025 Honda CRF250R
2025 Honda CRF250RX
2025 Honda CRF450R
2025 Honda CRF450R W.E.
2025 Honda CRF450RX
2025 Honda CRF450X
2026 Honda CRF250R
2026 Honda CRF250RX
2026 Honda CRF450R
2026 Honda CRF450R W.E.
2026 Honda CRF450RX
2026 Honda CRF450X