The All Balls Countershaft Seal Kit, manufacturer part number 25-4031, provides the replacement sealing components needed to service the countershaft area on compatible Yamaha sport ATVs. Designed as a direct-fit maintenance solution, this kit helps restore dependable sealing performance and supports proper drivetrain service without requiring the components to be sourced individually.
The kit includes a replacement outer seal along with the O-rings, snap rings, and lock washers required for installation, where applicable. Each component is selected to support a complete countershaft seal repair and help reduce the risk of leaks caused by worn or damaged sealing hardware. The All Balls brand is recognized for replacement powersports components built for practical fitment and reliable service.
Fitment includes the 2009–2017 Yamaha YFZ450R and the 2010 Yamaha YFZ450X. Verify the vehicle model and year before ordering to ensure compatibility. This kit is intended for riders, technicians, and powersports repair professionals performing countershaft seal maintenance on the listed Yamaha ATV applications.
Features:
- Complete service kit: Includes the replacement outer seal along with required O-rings, snap rings, and lock washers where applicable
- Direct-fit application: Designed for compatible Yamaha ATV countershaft service
- Reliable replacement: Helps restore proper sealing and protect against countershaft-area fluid leaks
- Broad fitment: Fits 2009–2017 Yamaha YFZ450R and 2010 Yamaha YFZ450X models
- Brand and part number: All Balls 25-4031 countershaft seal kit
Fitment:
2006 Yamaha YFM700R Raptor
2007 Yamaha YFM700R Raptor
2008 Yamaha YFM700R Raptor
2009 Yamaha YFM700R Raptor
2009 Yamaha YFZ450R
2010 Yamaha YFM700R Raptor
2010 Yamaha YFZ450R
2010 Yamaha YFZ450X
2011 Yamaha YFM700R Raptor
2011 Yamaha YFZ450R
2011 Yamaha YFZ450X
2012 Yamaha YFM700R Raptor
2012 Yamaha YFZ450R
2013 Yamaha YFM700R Raptor
2013 Yamaha YFZ450R
2014 Yamaha YFM700R Raptor
2014 Yamaha YFZ450R
2015 Yamaha YFM700R Raptor
2015 Yamaha YFZ450R
2016 Yamaha YFM700R Raptor
2016 Yamaha YFZ450R
2017 Yamaha YFM700R Raptor
2017 Yamaha YFZ450R
2018 Yamaha YFM700R Raptor
2018 Yamaha YFZ450R
2019 Yamaha YFM700R Raptor
2019 Yamaha YFZ450R
2020 Yamaha YFM700R Raptor
2020 Yamaha YFZ450R
2021 Yamaha YFM700R Raptor
2021 Yamaha YFZ450R
2022 Yamaha YFM700R Raptor
2022 Yamaha YFZ450R
2023 Yamaha YFM700R Raptor
2023 Yamaha YFZ450R
2024 Yamaha YFM700R Raptor
2024 Yamaha YFZ450R
2025 Yamaha YFM700R Raptor
2025 Yamaha YFZ450R
2026 Yamaha YFM700R Raptor
2026 Yamaha YFZ450R