This C100 CDI (Capacitor Discharge Ignition) unit is specially designed for C100 100cc motorcycle engines. The internal circuit board is fully epoxy sealed, offering great protection against dust, moisture, vibration and high temperature. It delivers accurate ignition timing and powerful consistent spark, improving combustion efficiency and engine power output. It ensures reliable cold start and smooth engine running across different RPM ranges. Plug-and-play design, no modification required. Every CDI passes rigorous performance testing, ideal replacement ignition spare part for motorcycles and tricycles.