Kawasaki KLX/KFX400 Piston Set - Wiseco - 92.00 mm Bore, 13.5:1 CR - '03-'06. A forged Wiseco piston kit built to replace the stock pistons in Kawasaki KLX/KFX400 models from 2003–2006, supplied as a complete install package.

This Wiseco Forged Series piston is designed for riders and tuners who need a reliable, high-strength replacement that maintains factory fitment while supporting higher compression. The kit includes the piston, wrist pin, rings, and circlips so you have everything required for installation. The forged construction improves fatigue resistance and longevity under repeated high-stress conditions, and the 13.5:1 compression ratio is specified for performance-minded rebuilds where that CR is desired. Dimensions and tolerances match the 92.00 mm bore specification for correct cylinder fit.

Features

• 92.00 mm bore, 13.5:1 compression ratio
• Forged aluminum construction for improved strength and wear life
• Complete kit: piston, wrist pin, rings, and circlips included
• Direct fit for Kawasaki KLX/KFX400 models '03–'06
• Manufactured by Wiseco, known for consistent quality and tight tolerances

If you have questions about fitment, installation, or compatibility, call us directly — we’re happy to help. We have full installation and customization services at two locations: Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) to schedule service or get expert advice. If you are considering purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

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