I've seen a few posts concerning weak horns. I found my problem! I posted this on the touring forum but thought I'd post it here also.

I had the weak horn syndrome also and fidgeted with it a bit but it stayed weak so I was going to have the dealer look at it next time I had it in. Well today I NEEDED the horn and of course it sounded like a half screwed... ah.. half baked horn so when I got home I took the nut off to check it out and turned it upside down and WATER poured out of it. I hit the key and horn button and it's back to normal. A few weeks ago I rode 150 miles in a torrential rainstorm and obviously it got into the horn..
Just something to check for you half horned guys!

 

not to forget, wasps and dirt dobbers love to make nests in there too.

 

i saw where someone mounted an extra horn over the shocks and then it sounded like a car. i was thinking i dont want the cage to look for a car

 

Mine had a liter of water inside. But never returned to the original sound!

 

Yea, I learned that myself last August. Wonder how many riders buy new horns when it's just water in them.