Kawasaki KFX400 Piston Sets - Wiseco - 90.00 mm Bore, 13.5:1 CR - `03-`06. A direct-fit, forged piston kit intended for Kawasaki KFX400 models from 2003–2006, supplied with the components needed for a standard rebuild.

Wiseco forged 4-stroke pistons are engineered per specific engine applications and machined to tight tolerances. This KFX400 kit uses dedicated forgings to balance strength and weight, with improved tensile strength of the forged material to support longer service life under typical riding conditions. The kit includes high-quality piston rings, wrist pin(s), and circlips and is manufactured, forged, and machined in the USA in Mentor, OH. These pistons are suitable for riders and technicians looking for reliable replacement parts that maintain factory dimensions while benefiting from forged construction.

Features

• Fitment: Kawasaki KFX400 model years `03–`06
• Bore: 90.00 mm; Compression Ratio: 13.5:1
• Includes piston rings, wrist pin(s), and circlips
• Dedicated forged design for optimized strength-to-weight
• Engineered, forged, and machined in the USA (Mentor, OH)

If you have questions about fitment, installation, or pairing these pistons with other components, call us directly — we’re happy to help. We offer installation and customization services at our two locations in Austin, Texas and the Los Angeles, California area. Call us: 512-982-9393 (TX) or 562-981-6800 (CA).

If you are considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov