Athena P400485100029 58mm 144cc Big Bore Cylinder Kit

Athena Big Bore Cylinder Kit 144cc – 4.00mm Oversize to 58.00mm 14:1 Compression – 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.