The ATHENA Big Bore Cylinder Kit delivers a high‑performance upgrade with hard anodized power valves and a forged domed piston kit that mirrors the original design. The aluminum cylinder features a nickel‑carbide coating and is ported to Factory Works specifications, ensuring precise airflow and combustion efficiency.
Included with the kit is the Athena top‑end gasket set, complete with all required seals and hardware for a secure installation. Note that the cylinder head is not part of this package and must be sourced separately.