Black Stebel Nautilus Compact Motorcycle Air Horn - Loud

This is absolutely the loudest horn on two wheels in Korea! Installation was very simple. I ordered the wiring harness too, helped a lot. I installed it in my Hyosung Rally 100. Soooo easy! I used the stock horn bracket moved over to the left relay mount. The hardest thing is running a 20 amp wire from the Stebel relay all the way up front to the horn. I used large guage wire and put it inside a plastic tube to protect from chaffing. But best of all, the shipping hauled and was here in <10 days! Beep, beep!!! ha ha ha....

I bought this for a Harley Sportster and the installation has been a serious hassle.

First, the horn is large and awkward and they state that it must be vertical and the intakes must be facing backward, but the horn only has a single mounting option so it was very difficult finding a spot on a motorcycle to place it.

Second, the instructions state 40ft-lbs of torque required, but the cheap metal from which they made the the bracket cracked after about 20ft-lbs.

I still have not found a place on my bike to mount this awkward-cracked beast-horn and without a machine shop to fabricate a bracket, it looks unlikely. So, I reinstalled my old horn and I still sound like the road runner (meep meep).

As for function, I tried it for volume both with and without the relay. The relay makes a big difference, but adds a bit of hassle when wiring. Depending on how your machine is wired, the diagram may be wrong. If you understand that your old horn button actuates the 85/86 circuit, which relays to the 87/30 and actuates this horn, you should be fine. With the relay, the horn is a loud two tone blast that will definitely get noticed. It sounds a bit like a locomotive horn. Pretty sweet... if you can attach it.

I would welcome any tips on attaching this horn.

After reading the reviews, I expected the horn to be louder. It is pretty loud, but don't expect it to compete in loudness with air horns on cars and trucks. It's also relatively high pitched and musical, so it's not as aggressive of a sound as you might hope. I did a test where I put my video camera inside my car with music playing, and rode by on my motorcycle with the old and then new horns honking. In both cases the horn was tough to hear until the motorcycle was pretty close or there was a pause in the music. That said, on my first ride with the new Stebel, a van pulled in front of me so I honked (having a new horn made me a bit trigger happy). The van pulled off the road and stopped, which is a more dramatic reaction than I've ever had before. Something about the air horn sound just seems to get people's attention.

Installation was a real bugger. I spent many hours hunting for a place to mount it, crafting a mounting bracket, and wiring it up. It's fairly large and heavy, and I wanted it to be hidden by my bike's fairing, so there weren't many installation choices. The wiring kit I bought for an extra $10 didn't include long enough wires to reach from my battery to the old horn (I wired the relay for the Stebel in parallel with my old horn to make both of them useful), so I still had to make a trip to the hardware store for supplies.

Overall, I do think this horn is a worthwhile safety feature, and I'm glad I added it to my VFR800. Just be sure you're up to a big project before starting it yourself.

I had this horn installed on my Kawasaki "Indian" Drifter in the space for the original horn without any problem.

It's the most important modification I've done - and one of the cheapest! The horn is loud enough to be heard by anyone in the general area - even with their windows up and their sound system at full blast.

Unfortunately, the rider's ears will always be just a few feet from the horn, and a short blast is actually painful - even with a helmet on!

In a word, "WOW"!
Hardest part of installation was figuring out how/where to mount it (Suziki Bandit- left side under fairing). Found a lot of good ideas on various Forums, but still had to fabricate a bracket. Wiring up was easy with the optional wiring kit. The relay in the wiring kit is sort of cheap and weak (mount broke when screwing it on. Had to zip-tie to frame).
I have used the once to save my hide; a car was going to t-bone me shile he was at a stop and I was turning left. I thought we had made eye contact, but right before I passed in front of him, he pulls out and is on a course to clip me. I laid on the horn, and he jerked to a stop with a wide-eyed look. then he giove me the "sorry, my bad" wave. Scared the heck out of my buddy when he was checking out my bike.

A very sound (pun intended) inverstment in your personal safety.