The Athena Cast Lite Big-Bore Piston Kit is designed for Yamaha YZ125 two-stroke models from 2005 through 2014. Manufactured by Athena, this piston kit uses a cast aluminum piston design intended to provide dependable performance, consistent operation, and reliable service for motocross and off-road applications. The kit is identified by manufacturer part number S4C05800003B and vendor part number 68-4936B.
Engineered as a model-specific replacement component, this Athena piston kit is suitable for maintaining or rebuilding the top end of compatible Yamaha YZ125 engines. Its cast construction supports reliable fitment when installed with the appropriate related components and according to the motorcycle manufacturer’s service procedures. Verify the existing bore, piston specification, and complete engine configuration before installation to ensure proper compatibility.
Fitment includes 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, and 2014 Yamaha YZ125 models. The kit is intended for riders, technicians, and powersports professionals who need a direct-fit Athena replacement piston solution for Yamaha YZ125 applications. Always inspect the cylinder, connecting rod, wrist pin, circlips, and other top-end components before assembly, and follow all recommended clearance and break-in procedures.
Features:
- Brand: Athena
- Product Type: Cast Lite big-bore piston kit
- Model Fitment: Yamaha YZ125
- Fitment Years: 2005-2014
- Manufacturer Part Number: S4C05800003B
- Vendor Part Number: 68-4936B
- Application: Replacement top-end piston for compatible Yamaha YZ125 two-stroke engines
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