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Upgrade your YZ250 with the ATHENA P400485100042 cylinder kit, designed for exceptional performance and durability. This kit features a precision-machined aluminum cylinder with a nickel carbide coating, providing enhanced wear resistance and longevity. The aluminum cylinder head includes a removable bronze dome, allowing for fine-tuning and maintenance to optimize engine efficiency. The kit’s specially designed, high-performance hard anodized power valves are engineered to outperform OEM components, although they are not compatible with OEM parts. Included in the kit is an Athena top end gasket set, complete with all necessary seals and hardware to ensure a reliable, airtight seal during operation. The piston kit comprises a forged race piston, rings, clips, and pin, delivering increased strength and resistance to the stresses of high-performance riding. This comprehensive package offers a significant upgrade over stock components, providing improved power output, responsiveness, and engine longevity for competitive or recreational riders. Built with quality materials and precision engineering, the ATHENA cylinder kit is an ideal choice for those seeking to maximize their YZ250’s potential while maintaining reliability and ease of installation.
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