Kawasaki KLX Piston Kit - Wiseco - Forged Series, 94.50 mm Bore, 13.5:1 CR - `03-`06. A complete forged piston package designed for riders and tuners who need a durable, high-quality replacement piston for KLX/KFX 2003–2006 applications.

This Wiseco Forged Series kit provides a reliable base for performance and longevity without guessing parts compatibility. Each kit includes the forged piston, wrist pin, rings, and circlips so you have the components required for a straight swap or as the foundation for a tuned build. Forged construction improves material strength and resistance to stress compared with cast pistons, making it a common choice for riders who demand consistent service life under harder use. This 94.50 mm bore and 13.5:1 compression ratio matches specified applications for the listed model years and is suitable for a variety of four-stroke environments including off-road and dual-sport setups.

Features

• Complete kit: piston, wrist pin, rings, circlips included
• Forged aluminum piston for increased durability
• 94.50 mm bore / 13.5:1 compression ratio — matches '03–'06 KLX/KFX applications
• Designed for four-stroke off-road and dual-sport engines

If you have questions about fitment, installation, or pairing this piston with other upgrades, call us directly — we’re happy to help. We offer installation and customization services at two shop locations: Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) for parts, labor estimates, or to schedule service. If you’re thinking about purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

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