I was trying to let this lorry driver know my displeasure at him running a red light, but ended up sounding the horn way too briefly and pulling a little wheelie (more of a hop) instead. I forgot my clutch was out when I blipped the throttle.
Now actively looking for a louder horn with a better button position.
if this is such a huge problem, just replace the switchgears with one form another Yamaha.
I had a quick search on Ebay, and switchgears seem to run between $30-50 each, a small wiring job and your troubles should be gone for $100 and a small personal effort..