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Horn Replacement

pnguzzi

pnguzzi

Cruisin' Guzzisti
Joined
Sep 8, 2009
Messages
144
The cute little Stelvio horn took a dump.
I am looking to replace it, with similar, maybe louder :).
I would like to avoid installing a relay as required for a high amperage horn.

What is the maximum current draw allowed for the stock horn wired through the bar switch?

Cheers P
 
Good question, look at the schematic to see the amperage of the fuse that powers the anemic horn. If you want a good horn, go with a relay and something that can be heard. You can use the existing horn wires to trigger the relay and just add a fused power line.
 
There are a few, quite small after market alternatives which are far superior in the loud stakes. If you can find a small dual horn setup (I think Fiamm do one) it'll be MUUUCH louder. The dissonance of 2 horns, only 100 or so hertz different in frequency is what creates the real ear-grabbing sound. Check out the Stebel compact motorbike air horns. There's also the Denali Sound Bomb. These are both actually twin-in-one air horns.

As for current draw; for horns I don't worry about it. They are (or should be) only used intermittently (1 or 2 secs at most) and are unlikely to be a problem to any wiring. If you're worried about it, use the standard horn wires to switch a relay and draw your horn current, via a fuse, directly from the battery - qed! The only time I used a relay was with some twin car air horns I had on a couple of bikes (BMW R100RS - has the space to mount and the eclectrickery to run 'em).
 
If you use the Stebel compact you will need a relay. It wouldn't hurt to use a relay for the Fiams either. Getting enough current makes a big difference in operation.
 
I've fitted a Denali sound bomb , compressor is near the battery with its relay , horn part is right up the front connected with the rubber hose .
Absolutely gorgeous loud sound now
 
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