Originally Posted by
rekmeyata
That's weird, because here in Indiana I've actually seen quite a few from Harleys to crotchrockets. If you have MC I would strongly recommend you get this because it does make you notice them fast and from a distance.
Modulating motorcycle headlights are actually an old feature that had been eliminated by improved technology -- when I had a motorcycle whose 6V battery was charged by a magneto that pulsed once per engine revolution, the voltage variation to the light was huge. As charging systems improved, headlight modulation decreased, to the point that some people now add it intentionally.
Note that many states regulate the percentage modulation and it's almost never actually a flashing headlight like a bicycle, it's a few % modulation, yet plenty to increase the conspicuity of the light.