CDI BOX 150 200 250CC GY6  ENGINE ATV KAZUMA AIMEX SUNL CDI - (Capacitive Discharge Ignition) Electrical device that controls spark and timing. Used in 4-stroke engines up to 250cc. with 12 volt charging systems. This quality CDI rev box is good for most  Redcat, Kazuma, SunL and other China made ATV's, pocket bikes, Go kart, beach buggies and scooters It can also be used with many Honda, Yamaha, Bombardie, Kawasaki, Polaris, and Suzuki Models.