I think it gets plenty of airflow and haven't noticed any issues so far... Not sure which bag it is except that it's a harley branded leather one. It came on the Nightster I bought years ago and I kept it when I traded in for the BO.

 

Same doubt about the voltage regulator.

 

http://www.howardshorns.com/

I think one of these on the left would look and sound terrific. Darned if I can figure out how to get it mounted there on a BO. Anyone seen / done it ?

 

Well, I prefer stock BO horn, I had "cowbell" horn on my previous bike and didn't like it so much.

 

If you need one of those you should think about what might be wrong with your exhaust

 

I don't need no stinking horn! I have Big City Thunder baffles!:-)

 

IMHO a classy exhaust is loud enough to deliver the potato, potato with distinction but quiet enough to make haters work for it . "A ballet of the senses", if you will. Air horns are for show and crow .

 

Horns, who needs them. I actually removed mine and put it on my wifes Sportster.

 

Apparently your wife does.

 

She just likes the way it looks. I don't think I have ever heard her use it.
It does look much better on her bike imho.