Athena 074900/1 Cylinder Kit with Head 80 cc Diameter: 47.6

RACER 50, CLUB 50, 491 GT 50 AC, CIAK MASTER 50, K2 50, AX 50, CIAK MONO EURO 2, K 50, JT 50, CAROSELLO 50, F12 PHANTOM 50, YA EQUALIS 50, ATLANTIS TWO CHIC, JOG 50, CENTRO SL KAT, SCARABEO 50 Built from race proven designs to Yamaha factory specifications Chosen by the top race teams in all forms of racing including super cross, motocross, GNCC, superbike, and more Maximizes HP and service life in Yamaha Dirt Bikes and offroad vehicles