According to se several sources of info on the web irridium plugs need less Voltage than ordinary plugs to produce a powerful spark at the plugs.
As far as scooters are concerned, I think this is a major advantage, specially because the batteries on our scooters are small and do not have high Amps/Hour storage capacity. Recent reports at this forum indicated that cases where batteries were on it’s way out, scooters with DC CDI’s battled to start, or failed to start completely.
In theory this obviosly means if Iridium plugs were fitted to those scooters which has starting problems before batteries were changed, the engines would probably start without problems. Maybe somebody must just try an Iridium plug while a scooter’s battery is on it’s way out in future, and see what happens.
In short - I think on scooters Irridium plugs could cause less “down timeâ€, more reliability, less frustration, and even add a little extra power to the engines.
https://oards.com/iridium-vs-platinum-spark-plugs-info/