ATHENA CYLINDER KIT YFZ 450 (ATV) BIG BORE KIT

Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets

Includes Forged piston, 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