- Kits come complete with aluminum cylinder (with a nickel carbide-plated 47.66mm bore), cylinder head, piston assembly (piston, rings, 10mm wrist pin and circlips), carbon reeds and all required top-end gaskets
- Optional high-performance crankshafts (sold separately) replace OEM and are manufactured to Athena's highest standards
- Replacement top-end gasket kits and piston kits also available separately
NOTE: It is recommended that Athena's 17.5mm or 19mm Scooter carburetor be used with these bolt-on big bore kits. See Fuel Systems section.