Bought this bad boy 1 piece 2 tone airhorn off ebay for $50 to go on my Versys.
It is advertised as being a direct replacement for your OEM horn, by merely swapping the OEM wires onto the air horn and placing the air horn onto the OEM horn mount. I had my doubts as air horns and other high drain equipment usually need a relay and heavier wiring than stock.
Quality is ok for what I paid although the 2 chrome discs rotate quite easily and will probably be a vibration point.
The weight will probably be too much for the OEM mount and in fact the OEM is mounted close to the exhaust pipes which the instructions say to avoid.
I read the instructions and getting to the motorcycle fitting part sure enough you need a relay (supplied) and wiring, fuse holder and fuse (not supplied). That doesn't bother me as I have been fitting stuff like this to cars and bikes since I was young and I have the knowledge and equipment to do so. However for someone challenged by wiring and soldering the temptation might be to hook it up directly. Don't do it!
Get help or pay someone to do it properly.
So next step is to buy the missing bits and hook it up. I also need to figure where I will mount it, probably to the crash bars. I also have to mount the relay.
I mounted the horns on the crash bars using an adel clamp
Wired it up so the wires cannot be seen apart from the 2 running under the horn to activate it. I used a in-line fuse holder that has an LED which comes on if the fuse is blown.
All I need now is to buy 2 connectors I forgot to buy today, the power connector (battery) and the earth connector and I'll take it somewhere and record the noise. Forgot to mention the relay I stuck in one of the many open frame tubes under one of the plastic covers.
And here is the noisy bit