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The ATHENA YZ85 Cylinder Kit offers a high-performance upgrade designed for serious riders seeking increased power and reliability. Featuring a nickel carbide coated aluminum cylinder, this kit provides enhanced durability and resistance to wear. The larger water jackets improve cooling efficiency, ensuring optimal engine temperatures during intense riding conditions. The kit includes a specially designed, hard anodized power valve (not compatible with OEM parts) that delivers improved throttle response and power delivery. The aluminum cylinder head is equipped with a removable bronze dome, allowing for a higher compression ratio and anti-detonation features, which contribute to better engine performance and fuel efficiency. This comprehensive kit comes complete with a Cast-Lite flat top piston, promoting efficient combustion and power output, and an Athena top-end gasket set that includes all necessary seals and hardware for a seamless installation.
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