I have a 2009 MP3 500 IE. When I leave the bike parked, I usually turn the bars and lock the forks. Suspension is locked, kickstand down and parking brake engaged.
The bike will be left like this for up to 2 weeks at a time as I do not get to ride it often.
I the bike is left like this for more than an hour or so, the horn will start beeping whenever I insert the key and turn to the on position. The only way I can get it to stop is to start the bike and twist the throttle. It's rather embarassing and I cannot seem to figure out why.