Yamaha YFZ450 Piston Set - Wiseco - Forged Series, 12.4:1 CR, 96.00 mm Bore - '04-'13. A direct-fit forged piston kit for Yamaha YFZ450 models (2004–2013) intended for riders looking to rebuild or upgrade the top end with durable, race-proven hardware.

This Wiseco Forged Series piston set is supplied as a complete kit that includes the piston, wrist pin, rings, and circlips for straightforward installation. Manufactured from forged alloy, these pistons are built to withstand high-stress conditions encountered in ATV and sport riding. The 96.00 mm bore and 12.4:1 compression ratio match the specified application and are suitable for performance-oriented rebuilds where a reliable, serviceable piston is required.

Features

• Forged aluminum construction for improved strength and fatigue resistance
• Complete kit: piston, wrist pin, piston rings, and circlips included
• 12.4:1 compression ratio tailored to the listed YFZ450 applications
• 96.00 mm bore size to fit 2004–2013 YFZ450 engines
• Designed for a range of 4-stroke powersports applications (ATV/UTV/dirt bikes)

Whether you are repairing a worn engine or preparing a track-ready machine, this Wiseco Forged Series kit provides the core hardware needed for a reliable top-end rebuild. If you have questions about fitment, clearances, or companion components (gaskets, rings, or coatings), call us and we’ll help confirm compatibility.

We have two shop locations offering installation and customization services: Austin, Texas and the Los Angeles, California area. Call us with any questions at 512-982-9393 (TX) or 562-981-6800 (CA). If you are considering purchasing multiple items, contact us about shipping discounts. We install on premises at both locations.

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