Earlier this year someone posted a v. good thread w/pics of a horn replacement. The "new" horn , as I remember it, was an off-the -shelf item from a local parts store and was an identical size to replace the ineffective horn found on older GSs. No relays or fuse upgrades were needed for this mod. It was an easy swap as I recall. I've done several "Horn" searches, but cannot find it. Anyone out there remember this thread? Thanks for helping if you can.
Holy Crap, its the Horn replacement (http://cgi.stanford.edu/~sanjayd/gs500/Upgrades/Horn)
Sorry, I just wanted to beat Alpha again. It also appears that most the pics aren't working, as in links to pics are broken but it does give the model of the replacement.