Athena Manufacturing

U0931-0258

Athena - Big-Bore Cylinder Kit Yz125 Lc 58M P400485100029 Pu

Cylinder Heads

Fitment: 2004 YAMAHA YZ125
2003 YAMAHA YZ125
2002 YAMAHA YZ125
2001 YAMAHA YZ125
2000 YAMAHA YZ125

BIG-BORE CYLINDER KIT: Includes aluminum cylinder with nickel-carbide coating. Specially designed, high-performance, hard-anodized power valves (cannot use OEM). Specially designed, high-performance, forged OEM-style domed piston kit. Athena top-end gasket set including required seals and hardware. Easy-to-follow, step-by-step installation instructions. CYLINDER KITS: Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets. Forged piston black graphite or clear tin coating; includes rings, clips and pin. Athena top-end gasket set includes required seals and hardware. Easy-to-follow step-by-step installation instructions. Most are bolt-on; no machining required except where noted. STOCK BORE RACE CYLINDER KITS: 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). Specially designed, high-performance, Cast-Lite flat-top piston kit. Athena top-end gasket set including required seals and hardware. Easy-to-follow, step-by-step installation instructions. BIG BORE RACE CYLINDER KITS: Include aluminum cylinder with nickel-carbide coating. Specially designed, high-performance, hard-anodized power valves (cannot use OEM). Specially designed, high-performance, forged OEM-style domed piston kit. Athena top-end gasket set including required seals and hardware. Easy-to-follow, step-by-step installation instructions. NOTE: All 4-stroke kits do not include cylinder head.

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