What have you done to bike » Stebel Nautilus Horn?

Has anyone installed a Stebel Nautilus on their RS? Curious where you were able to mount it on the bike?

The horn is 7.6 x 11.4 x 11.4 cm (3 x 4.5 x 4.5 in) and needs to be mounted upright to work......can anyone think of a suitable location?

I've mounted several of these to many bikes and you can always find space for them as the trick is to separate the canister from the horn. All you need to purchase is clear tubing and a plastic hose splice. I think I just used either refrigerator water line tubing or flexible fuel line tubing. Pretty simple to separate and find space where ever. The installation instructions say that the can has to be upright, but I've mounted it sideways and it still works. Here's a pretty detailed instruction sheet I wrote.

1. Stebel Nautilus Compact Air Horn. Should come with the horn and compressor as one unit and a 4 point standard relay.
2. 18 gauge wire (two colors for + and -)
3. At least 6 female crimp connectors (4 for the relay, 2 for the compressor)
4. 1 or 2-male bullet connectors (if you'll be connecting to accessory wiring)
5. 1 - 2-feet of flexible air line (more if you're planning to mount the compressor farther away from the horn)
6. 2 - 1.25" steel hose clamps or you can make your own custom clamps (one for compressor, one for the horn assembly)
7. 1 - 5/16ths outside diameter hose splice (only needed if you separate the compressor from the horn)


Notes: If you mount the Stebel as one unit you won't need any air line or the hose splicer at all. The Stebel directions state that you have to mount the compressor within 25 degrees of vertical, but I've mounted almost all of mine horizontally with no problems.

If you decide to separate the compressor and horn, it can be a bit tricky. What you want to do is pry apart the "arms" that wrap around the compressor to disengage indent points on the compressor while using your thumbs to push the compressor so the insert tube disconnects from the horn. Don't loose that little rubber gasket that's in there. Now may be a good time to paint the compressor black or any other color you choose. I would also wait to chop up the horn portion until you know exactly how you want to mount everything. If you mount the compressor in another location you may need more air line.

How To Do It

1. Remove the stock horn. You'll be using the stock horn wire to activate the relay.
2. Mount your relay where you want it. The choices for this is infinite, so find somewhere stealthy.
3. I used this wiring scheme found online. Connect posts 85 and 86 of the relay to the stock horn wires.
4. Connect a wire between post 87 and the positive (+) connection on your compressor.
5. Connect a wire from the negative (-) side of the compressor to a good ground. You can use the frame or the negative accessory wire.
6. Connect a wire between post 30 on the relay and a good 12v positive source. You can also connect directly to the battery if you wish using an inline fuse.
7. Mount the compressor using the hose clamps (you can make custom clamps later). You choose what will work best.
8. Test. Turn on the bike, press your horn button and you should hear the compressor start up. If nothing happens or if the compressor starts up before you press the horn button, then something is wrong with your wiring.
9. Now, mount the horn portion of your assembly. You can use the stock horn mount if you wish, but I want it to be heard not seen. I've installed it under the subframe. Don't think that it needs to be in the front of your bike… people will hear it if you use it as it's super loud.
10. WARNING, this part is very loud! Connect your air hose and test again. If you're inside a garage, you might want to roll the bike outside for the test. Be a good neighbor and don't do it too early in the morning or too late at night either.

Note: All wiring and connections should be covered by shrink tubing, electrical tape, sealant or a combination of these to make everything as waterproof as possible then hidden from view.