“No rev limit” racing capacitor discharge ignition (CDI) module for 125cc & 150cc scooters, pit bikes, ATVs, and Go-Karts This is a high performance CDI module designed for use on 4-stroke GY6/QMB139 Honda-style Chinese made engines Description “No rev limit” racing capacitor discharge ignition (CDI) module for 125cc & 150cc scooters, pit bikes, ATVs, and Go-Karts. This is a high performance CDI module designed for use on 4-stroke GY6/QMB139 Honda-style Chinese made engines. Increase your acceleration and performance with a simple “plug and play” switch of your CDI.Acceleration, particularly on hills and steep inclines, will be greatly increased.The 4-stroke 125cc & 150cc GY6 style engines are commonly found on Chinese made scooters, pit bikes, go karts, dirt bikes, and ATVs.Compatibility is based on matching wiring and connectors. Please ensure your make and model have the same connector and number of pins prior to ordering.Note: 4-stroke and 2-stroke engines require differe