The PROX 01.3420.B Forged Piston Kit is designed for reliable performance and direct interchange with applicable OEM components. This standard-bore piston kit is engineered for Nikasil-plated cylinders and features an 89.97 mm piston diameter with a 12.2:1 compression ratio. It provides a cost-effective alternative to OEM replacement parts while maintaining the fit and function needed for supported Kawasaki and Suzuki 400 applications.
The complete kit includes the forged piston, piston rings, wrist pin, and retaining clips, providing the primary components needed for a piston replacement. Its application-specific design helps simplify installation and supports dependable engine operation when used with the correct cylinder, clearances, and related service components. Always verify cylinder condition and manufacturer service specifications before installation.
Fitment includes the 2003–2006 Kawasaki KFX 400, 2003 Kawasaki KLX400R, and 2000–2004 Suzuki DR-Z400. The manufacturer is PROX, and the vendor part number is 01.3420.B. This piston kit is intended for standard-bore applications and should be confirmed against the vehicle model, year, cylinder type, and existing engine configuration before purchase.
- Feature: Forged piston kit designed for Nikasil-plated cylinders
- Feature: Standard-bore 89.97 mm piston with a 12.2:1 compression ratio
- Feature: Includes piston, rings, wrist pin, and retaining clips
- Feature: Directly interchanges with applicable OEM parts
- Feature: Fits select Kawasaki KFX 400, Kawasaki KLX400R, and Suzuki DR-Z400 models
Features:
- Forged piston kit designed for Nikasil-plated cylinders
- Standard-bore 89.97 mm piston with a 12.2:1 compression ratio
- Includes piston, rings, wrist pin, and retaining clips
- Directly interchanges with applicable OEM parts
- Fits select 2003–2006 Kawasaki KFX 400, 2003 Kawasaki KLX400R, and 2000–2004 Suzuki DR-Z400 models
Fitment:
2000 Suzuki DR-Z400
2000 Suzuki DR-Z400S
2001 Suzuki DR-Z400
2001 Suzuki DR-Z400S
2002 Suzuki DR-Z400
2002 Suzuki DR-Z400S
2003 Kawasaki KFX 400
2003 Kawasaki KLX400R
2003 Suzuki DR-Z400
2003 Suzuki DR-Z400S
2003 Suzuki Lt-Z400 QuadSport Z
2004 Kawasaki KFX 400
2004 Suzuki DR-Z400
2004 Suzuki DR-Z400S
2004 Suzuki Lt-Z400 QuadSport Z
2005 Kawasaki KFX 400
2005 Suzuki DR-Z400S
2005 Suzuki Lt-Z400 QuadSport Z
2006 Kawasaki KFX 400
2006 Suzuki DR-Z400S
2006 Suzuki Lt-Z400 QuadSport Z
2007 Suzuki DR-Z400S
2007 Suzuki Lt-Z400 QuadSport Z
2008 Suzuki DR-Z400S
2008 Suzuki Lt-Z400 QuadSport Z
2009 Suzuki DR-Z400S
2009 Suzuki Lt-Z400 QuadSport Z
2010 Suzuki DR-Z400S
2011 Suzuki DR-Z400S
2012 Suzuki DR-Z400S
2012 Suzuki Lt-Z400 QuadSport Z
2013 Suzuki DR-Z400S
2013 Suzuki Lt-Z400 QuadSport Z
2014 Suzuki DR-Z400S
2014 Suzuki Lt-Z400 QuadSport Z
2015 Suzuki DR-Z400S
2016 Suzuki DR-Z400S
2017 Suzuki DR-Z400S
2018 Suzuki DR-Z400S
2019 Suzuki DR-Z400S
2020 Suzuki DR-Z400S
2020 Suzuki DR-Z400SM
2021 Suzuki DR-Z400S
2021 Suzuki DR-Z400SM
2022 Suzuki DR-Z400S