Athena P400485100053 Stock Bore Race Cylinder Kits

Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets. Easy-to-follow step-by-step installation instructions. Most are bolt-on; no machining required except where noted. Include aluminum cylinder with nickel-carbide coating, ported to Factory Works specs. Two-stroke kits include an aluminum cylinder head with a removable bronze dome allowing for a higher compression ratio and anti-detonation features (except where noted). Two-stroke kits feature specially designed, high-performance, hard-anodized power valves (cannot use OEM). Easy-to-follow, step-by-step installation instructions.

Vehicle Fitment:

2014-2017 Yamaha YZ450F