P400485100017 - Athena Race Cylinder Kit For Yamaha YZ125 2005-2021 - Silver

Features: Aluminum cylinder is nickel carbide coated designed with larger water jackets. Specially 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 flat top piston kit, and an Athena top-end gasket set that includes required seals and hardware. Bolt on; no matching required except where noted. Stock bore, high compression..