Race Spec (RS) Rear Sprockets feature our revolutionary Angled Mud Groove. This exclusive design creates a self-cleaning effect during operation, shedding away mud that would otherwise lead to horsepower loss and sprocket wear. With their precise CNC machining and unique layout, these grooves also allow an increase in tooth surface area of up to 40% over competing sprockets. As a result, contact with the chain is significantly improved, leading to a marked increase in sprocket life over other brands. That's the ProTaper difference.
This Part Fits:
| Year |
Make |
Model |
Submodel |
| 1988-1995 |
Honda |
XR250R |
Base |
| 2001-2009,2011-2013,2015-2025 |
Yamaha |
WR250F |
Base |
| 1999-2000 |
Yamaha |
WR400F |
Base |
| 2001-2002 |
Yamaha |
WR426F |
Base |
| 2003-2009,2011-2025 |
Yamaha |
WR450F |
Base |
| 1999-2025 |
Yamaha |
YZ125 |
Base |
| 2024 |
Yamaha |
YZ125 50th Anniversary Edition |
Base |
| 2022-2023,2025 |
Yamaha |
YZ125 Monster Energy Yamaha Racing Edition |
Base |
| 2020-2025 |
Yamaha |
YZ125X |
Base |
| 1999-2025 |
Yamaha |
YZ250 |
Base |
| 2024 |
Yamaha |
YZ250 50th Anniversary Edition |
Base |
| 2022-2023,2025 |
Yamaha |
YZ250 Monster Energy Yamaha Racing Edition |
Base |
| 2001-2025 |
Yamaha |
YZ250F |
Base |
| 2024 |
Yamaha |
YZ250F 50th Anniversary Edition |
Base |
| 2021-2023 |
Yamaha |
YZ250F Monster Energy Yamaha Racing Edition |
Base |
| 2015-2025 |
Yamaha |
YZ250FX |
Base |
| 2016-2025 |
Yamaha |
YZ250X |
Base |
| 1999 |
Yamaha |
YZ400F |
Base |
| 2000-2002 |
Yamaha |
YZ426F |
Base |
| 2003-2025 |
Yamaha |
YZ450F |
Base |
| 2024 |
Yamaha |
YZ450F 50th Anniversary Edition |
Base |
| 2021-2023,2025 |
Yamaha |
YZ450F Monster Energy Yamaha Racing Edition |
Base |
| 2016-2025 |
Yamaha |
YZ450FX |
Base |
