The PROX 94.96 mm Piston Kit, manufacturer part number 01.2435.B and vendor part number 19-4680B, is designed as a direct-interchange replacement for the original equipment piston assembly in select Yamaha sport ATVs. This piston kit provides a practical alternative to OEM pricing while maintaining the components needed for a complete piston replacement.
The kit includes the piston, piston rings, wrist pin, and retaining clips, helping simplify installation during an engine rebuild or top-end service. Each component is matched for use with the specified piston application, supporting proper fitment and dependable performance when installed according to the vehicle manufacturer’s service procedures.
Fitment includes the 2004 Yamaha YFZ450 and Yamaha YFZ450R models from 2009 through 2017. Verify the model year, engine specifications, and existing piston size before ordering to ensure compatibility. The PROX brand and part number 01.2435.B are included for accurate identification and replacement-part reference.
Features:
- Cost-effective alternative to OEM pricing
- Directly interchanges with applicable OEM parts
- Complete piston kit includes piston, rings, wrist pin, and retaining clips
- 94.96 mm piston size for compatible Yamaha YFZ450 and YFZ450R applications
- Fits 2004 Yamaha YFZ450 and 2009–2017 Yamaha YFZ450R models
Fitment:
2004 Yamaha YFZ450
2005 Yamaha YFZ450
2006 Yamaha YFZ450
2006 Yamaha YFZ450 Bill Balance Edition
2007 Yamaha YFZ450
2007 Yamaha YFZ450 Bill Balance Edition
2008 Yamaha YFZ450
2009 Yamaha YFZ450
2009 Yamaha YFZ450R
2010 Yamaha YFZ450R
2011 Yamaha YFZ450R
2012 Yamaha YFZ450
2012 Yamaha YFZ450R
2013 Yamaha YFZ450
2013 Yamaha YFZ450R
2014 Yamaha YFZ450R
2015 Yamaha YFZ450R
2016 Yamaha YFZ450R
2017 Yamaha YFZ450R
2018 Yamaha YFZ450R
2019 Yamaha YFZ450R
2020 Yamaha YFZ450R