No, a bike typically cannot run without a CDI (Capacitor Discharge Ignition) or a functioning ignition system. The CDI is a crucial component of the ignition system in most modern motorcycles. It controls the timing of the spark that ignites the fuel-air mixture in the engine's combustion chamber.
The CDI system consists of several components, including the CDI unit, ignition coil, stator, and trigger/pulse generator. The CDI unit receives electrical pulses from the trigger/pulse generator and uses them to charge the ignition coil. When the electrical charge reaches a certain threshold, the CDI unit releases it, generating a high-voltage spark that ignites the fuel-air mixture in the engine.
Without a properly functioning CDI or ignition system, the spark plug will not fire at the correct time, and the engine will not start or run. In some cases, if the CDI unit is faulty or damaged, it may be possible to bypass it temporarily using alternative methods, but this is not a recommended or reliable solution. It's best to ensure that your bike's ignition system, including the CDI, is in good working condition for the bike to run properly.