The All Balls Countershaft Seal Kit, part number 25-4023, provides the replacement sealing components needed to help restore reliable countershaft protection on compatible Yamaha YZ125 motorcycles. Designed for a precise fit, this kit is a practical choice when servicing the countershaft area or replacing worn, damaged, or leaking sealing hardware.
Each kit includes a replacement outer seal along with the required O-rings, snap rings, and lock washers for the application. Using the correct replacement components helps protect against dirt and moisture intrusion while supporting proper lubrication retention around the countershaft. All Balls manufactures this kit for dependable fitment and straightforward installation during routine motorcycle maintenance or drivetrain service.
Fitment: Fits 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, and 2014 Yamaha YZ125 models. Verify the motorcycle model and year before installation to ensure compatibility. The manufacturer part number is All Balls 25-4023, and the vendor part number is 25-4023.
Features:
- Complete kit: Includes the replacement outer seal plus application-specific O-rings, snap rings, and lock washers
- Reliable sealing: Helps protect the countershaft area from dirt and moisture while retaining lubricant
- Direct-fit service component: Designed for compatible Yamaha YZ125 motorcycles
- Fitment: 2005–2014 Yamaha YZ125
- Brand: All Balls
- Manufacturer part number: 25-4023
- Vendor part number: 25-4023
Fitment:
2005 Yamaha YZ125
2006 Yamaha YZ125
2007 Yamaha YZ125
2008 Yamaha YZ125
2009 Yamaha YZ125
2010 Yamaha YZ125
2011 Yamaha YZ125
2012 Yamaha YZ125
2013 Yamaha YZ125
2014 Yamaha YZ125
2015 Yamaha YZ125
2016 Yamaha YZ125
2017 Yamaha YZ125
2018 Yamaha YZ125
2019 Yamaha YZ125
2020 Yamaha YZ125
2020 Yamaha YZ125X
2021 Yamaha YZ125
2021 Yamaha YZ125X
2022 Yamaha YZ125
2022 Yamaha YZ125X
2023 Yamaha YZ125
2023 Yamaha YZ125X
2024 Yamaha YZ125
2024 Yamaha YZ125X
2025 Yamaha YZ125
2025 Yamaha YZ125X
2026 Yamaha YZ125
2026 Yamaha YZ125X