Originally Posted by Thet
There is nothing, and I repeat, NOTHING illegal about air horns on non-comercial vehicles. Hence why I can install one, direct from manufacturer, on my Harley.
That's not the issue. You're correct, the fact that a horn is actuated by air does not make it illegal. The decibles produced can. In some states it is illegal to have a horn, that generates over a certain decible level, on a non-commercial or emergency vehicle. Even where that isn't the case, local noise statutes would prohibit using of most of the air horns sold. So it's better to be stealthy if you're going to have one. Airhorns for bikes are very small in comparison to the big horn trumpets being discussed, so they are not likely to draw the extra unwanted attention...unless you use them.