Seller notes

You are responsible for Knowing your 125 model & year. Made in Italy, Athena YZ125 stock size 54mm cylinder kit. Will fit the YZ125 2005-2021 YZ125X 2020-2022Aluminum cylinder is nickel carbide coated designed with larger water jacketsSpecially designed, high performance, hard anodized power valves (cannot use OEM)There is an aluminum cylinder head with a removable bronze dome allowing for a higher compression ratio and anti-detonation features (except where noted)Kit also includes a Cast-Lite f...

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