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