I've been thinking about replacing the factory horn with a Wolo air horn on my Street 750. The only problem is,there isn't really anywhere to mount a larger horn other than another horn that's about the same size as what's on it. So with the Wolo air horn being too large to mount behind the radiator,I thought about mounting it on the outside of the frame on the left side. I think I can fab some sort of bracket but I'm not sure that the factory horn relay will suffice. So if anyone has added something similar to what I want to add to my bike,then I could use some advice on wiring it and some ideas on mounting it.

Guess no one has added an air horn on their Street?

Hi, I had choose this one..
no any modification and using the original wire

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Is the PIAA horn much louder than the stock horn? And you say no modification as in using the factory horn relay?

Yes PIIA are 112 dB at 2.7A (instead of standard 108dB at 2.5A Roots company)

so louder than stock horn.
but mainly it doesn't look like a bicycle....
It's no need addictional relay, you can use the same cable.

Thanks Marco_dalea!