CDIs
 
Capacitive Discharge Ignition. A CDI module consists of a transformer, charging circuit, triggering circuit and a main capacitor. The way it works is the system voltage is raised up to 400-600V by a transformer inside the CDI module. Electric current flows to the charging circuit and charges the capacitor. The rectifier inside the charging circuit prevents capacitor discharge before the ignition point. When the triggering circuit receives triggering signals, the triggering circuit stops the operation of the charging circuit, allowing the capacitor to discharge its output rapidly to the low inductance ignition coil, which increases the 400V to 600V capacitor discharge to up to 40 kv at the secondary winding at the spark plug. When there's no triggering signal, the charging circuit is reconnected to charge back the capacitor.
 
We carry a large selection of stock and performance CDI units for both 2-stroke and 4-stroke engines ranging from 49cc to 250cc. Please check cdi specifications before ordering.