The PROX 01.4429.B Forged Piston Kit is designed for Kawasaki KX450F and KX450X four-stroke motorcycles with a standard 95.98 mm bore and 12.5:1 compression ratio. Manufactured by PROX, this piston kit is a direct interchange for the applicable OEM piston assembly and provides a cost-effective replacement option for engine rebuilding and performance maintenance.
This complete kit includes the forged piston, piston rings, wrist pin, and retaining clips, providing the primary components needed for installation. The piston is intended for use with Nikasil-plated cylinders and is engineered to match the specified Kawasaki engine application. Verify cylinder condition, bore size, piston-to-cylinder clearance, and installation specifications before assembly.
Fitment includes the 2019 and 2020 Kawasaki KX450F, as well as the 2021 through 2023 Kawasaki KX450F and KX450X models. The PROX manufacturer part number is 01.4429.B, and the vendor part number is 19-4429B. Confirm the model year and engine configuration before ordering to ensure compatibility.
Features:
- Cost-effective alternative to OEM pricing
- Direct interchange with applicable OEM piston components
- Complete kit includes forged piston, rings, wrist pin, and retaining clips
- Standard 95.98 mm bore size
- 12.5:1 compression ratio
- Designed for Nikasil-plated cylinders
- Fits 2019-2023 Kawasaki KX450F and KX450X models
Fitment:
2019 Kawasaki KX450F
2020 Kawasaki KX450F
2021 Kawasaki KX450F
2021 Kawasaki KX450X
2022 Kawasaki KX450F
2022 Kawasaki KX450X
2023 Kawasaki KX450F
2023 Kawasaki KX450X