The Yamaha YFZ 450 Big Bore Cylinder Kit by Cylinder Works is a performance-driven upgrade designed for the discerning ATV enthusiast. This kit offers increased engine displacement and horsepower for your 2004-2009 Yamaha YFZ 450, delivering improved performance without sacrificing reliability.

Designed with precision and durability in mind, this Big Bore Cylinder Kit includes a carefully matched Vertex piston and a top-end gasket kit with o-rings in a convenient all-in-one package. By opting for this kit, you gain significant cost savings compared to purchasing OEM components separately. Crafted from high-quality 2618 aluminum alloy, it ensures superior strength and longevity, making it a valuable addition to your machine. The kit increases the engine displacement to 468-478cc and offers a compression ratio of 12.0:1, providing that additional power and performance boost needed on the track or trail.

Features

• All-in-one kit for easy installation
• Increased engine displacement: 468-478cc
• Enhanced compression ratio: 12.0:1
• High-quality 2618 aluminum alloy construction
• Improved horsepower and overall performance

If you have any questions regarding this Big Bore Cylinder Kit or need help deciding if it’s the right fit for your Yamaha YFZ 450, feel free to call us directly. We have locations in Austin, Texas and the Los Angeles, California area, where we offer expert installation and customization services. Contact us at (512) 982-9393 (TX) or (562) 981-6800 (CA). If you're considering purchasing multiple items, reach out to us for shipping discounts. Installation is available on premises at both of our locations.

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