Yamaha YFZ450R Piston Set - Wiseco - 11.4:1 CR - `09-`19 is a complete forged piston kit engineered for the Yamaha YFZ450R (2009–2019). This Wiseco kit supplies the core components needed for a reliable top-end rebuild with a 96.00 mm bore and a factory-matching 11.4:1 compression ratio.

Built from Wiseco's Forged Series material, these pistons are intended for 4-stroke ATV applications where durability and consistent fit are priorities. Each kit includes the piston, wrist pin, rings, and circlips so you have the essential parts required for installation. The forged construction offers improved resistance to high-stress conditions compared with cast pistons, and the dimensional accuracy supports correct ring seating and oil control when installed to specification.

Features

• Fits Yamaha YFZ450R models 2009–2019
• 96.00 mm bore, 11.4:1 compression ratio
• Forged piston material for durability under load
• Complete kit: piston, wrist pin, rings, circlips included
• Designed for 4-stroke ATV high-stress service

If you have questions about fitment, installation, or choosing the right piston for your build, call us directly at 512-982-9393 (TX) or 562-981-6800 (CA). We have two locations—Austin, Texas and Los Angeles California area—where we offer installation and customization services on site. 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