I fitted my soundbomb about six weeks ago, and other than a quick test had no reason / occasion to use the horn until the other day.
Going down a road in a 30 mph area, I approach a section with a T junction joining the road (i.e. I have right of way). As I approach, there’s a car wanting to turn into the junction from the road I’m on, so I have my eyes on that car, whilst there’s also a large van looking to come out of the junction so I also have my eyes on that as well.
The guy in the large van slows down to an almost stop about 3 yards from the junction but has his eyes and left arm on the passenger seat, sorting something out. He doesn’t stop though and suddenly moves forward over the remaining 3 yards. I have no idea if he’s moving out or not.
Hit the horn. His head spun round like Linda Blair in the Exorcist, a dropped mouth and his eyes wide open!
All happened in a moment, I could then return my eyes on the car wanting to turn in - he’s staying put, great, on I travel on without breaking speed.
Now, I’ve no idea if van man would have pulled out. But it was a moment that brought home to me the reason why changing your horn should be among the first of the mods you do to a bike: loud horns probably save lives.
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If you buy the ridiculously overpriced canbus connector for bmws that Denali supply then, as others have said, the Denali is an easy plug and play fit. Denali also sell a bracket for the GS for fitting the standard soundbomb between the forks (though it needs to be at about a 20 degree angle to ensure fork clearance).