Practice question

What is the primary operational difference between an AC-CDI system and a DC-CDI system on a motorcycle?

  1. AC-CDI receives high-voltage AC power directly from the stator's exciter coil, while DC-CDI is powered by the 12V battery and uses an internal inverter to raise the voltage.
  2. AC-CDI requires a fully charged battery to start the engine, while DC-CDI can run completely without a battery.
  3. AC-CDI produces a stronger spark at high engine RPMs, while DC-CDI only works at idle speed.
  4. AC-CDI uses mechanical breaker points, while DC-CDI is a solid-state digital system.

Answer: A — AC-CDI receives high-voltage AC power directly from the stator's exciter coil, while DC-CDI is powered by the 12V battery and uses an internal inverter to raise the voltage.

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