A few months ago I upgraded the puny horn on the PC800 to something a little louder. The files section of the IPCRC has a document called “Stebel Compact Install.pdf” that does a very good job of outlining how to install the horn. These are a few supplementary photos I took to give people an idea of what they’re in for.
The air horn as it comes in the box.
I pried off the air horn from the compressor using a screw driver.
Next I zip-tied the air horn to the frame of the motorcycle below the lower cowl. Note that I have a bunch of other plastic removed from the bike for other work and that it doesn’t all need to be removed to do this job.
I tucked the air compressor behind the frame and ran a hose between the compressor and the air horn. This makes it have about a half second delay from pushing the horn button to the air horn sounding. Because of this, I decided to keep the original horn intact and working in conjunction with the new horn.
I used some fuel hose to tie the air horn and the compressor together.
I tied the hot wire of the relay that drives the air horn (it needs to be on its own circuit from the battery with a 15 amp fuse) to the hot wire of the stock horn on the bike.
My first “test subject” to use the air horn on responded as expected. He jumped about five feet in the air! I was quite pleased. Later that same day I actually got to use the horn in traffic when someone turned in front of me. They recognized quite quickly that I was on the road. This horn is LOUD and works WELL.