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I contacted Motohorn. They sell a complete kit, for less than $28.
That's pretty cheap,free shipping. No messing around trying to find the parts and locating my wiring supplies.
I was looking at the MotoHorn air horn but the bracket for the horn wasn't to my liking. I went to e bay and found an air horn that came complete, instant start compressor, harness with relay and single trumpet horn. I made the bracket, wired it in parallel with my OEM horn and this baby will get your attention.
The compressor fits on the rear fender and my 2 up touring fits over it with no interference.
I know this thread is over a year old but I trust everyone is still alive.
Redrod, I put the Motohorn trumpet in about the same place you put that trumpet - I can see the end of it just before the air deflector just like mine. My leg would hit it when I was putting my foot down. You didn't obstruct me from putting my foot down but was annoying.
Doesn't yours? I did like the loudness but I removed it because of that.
I put the dual tracks on instead. The compressor fit perfectly under the cowbell horn cover after I removed the ridiculous pre-2017 Harley horn. If you zoom in you can see the compressor just peeking out the bottom of the cowbell.
At one time I had all three horns on there but you can really only hear the loudest horn anyway. For some reason I didn't need a relay. I was ready to put one on but I didn't see how they'd be any louder and it wasn't blowing fuses or shutting off until the bike was turned on and off to reset as others have experienced..
Now I just have the dual tracks - a 400Hz and a 500hz along with a Wolo disk low 360Hz under the cowbell. The low tone makes it sound a lot beefier.
Doesn't the inside of your left leg hit the back of that trumpet?
Also that long trumpet mounted only in the center hornbolt vibrated like crazy.
And I think the two electric horns are a cleaner look than the trumpet air horn,
But I probably would have left it on if it didn't hit my leg.
Last edited by Robertbc3141; Jul 20, 2025 at 09:53 PM.
OK I installed a disc type Wojo low tone horn under the cowbell where the original Harley horn was and now it doesn't seem as loud as the two dual track coins alone.
I guess I need a relay.
I really didn't want to do that I'll probably just take out the disc horn.
I agree with others on here about it being better to get out of a situation rather than rely on a loud horn and beep about it.
But how do you get the smartphone enthusiast addict to move when the light turns green?
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