CDI unit — an ignition module that sends a pulse to the ignition coil at the right moment. For 4-stroke ATV engines of 110-125 cc.
- If it fails, the spark disappears, the engine stalls while warming up, runs unevenly, or does not pick up revs.
- Before replacing it, check the spark plug, the coil and the ignition pickup — the cause may be in them.
- Compare the connector, the number of pins and the power type (AC or DC) with the old unit.
