70cc Big Bore Cylinder Kit for 50cc 2-Stroke Air-Cooled Franco Morini Based Scooters INCLUDES: Cylinder Block Billet Head Piston Rings Wrist Pin Circlips Gaskets COMPATIBILITY: Aprilia – Habana (Mojito) 50 2T Atala – Byte AT 10 50 2T, Hacker AT 12-Racing 50 2T Derbi – Vamos 50 2T HSC – ZZ Sepia 50 2T Hyosung – Prima 50 2T, SB50 Super Cab Italjet – Formula 50 2T, Torpedo 50 2T, Velocifero 50 2T Malaguti – Crosser CR1 50 2T Siam – SCross 50 2T Suzuki – Address 50 2T, AJ-ZZ Sepia 50 2T, AP 50 2T, Katana 50 2T, Magic 50 2T, Zillion 50 2T TGB – R50X 50 2T, Laser R50 UM – X-Speed 50 2T Other Similar Models This 47mm cylinder kit will fit most 50cc 2-stroke Franco Morini based engines found on some TGB, Hyosung models.