I just installed the Scorpio SR-i500 alarm system on my 04 Busa. The system has parimeter warning if you walk up to the bike. The range is adjustable. Also has tilt and shock warning.It can also disable your ignition system. If your alarm is triggered your remote fob (key chain) will buzz or vibrate or both and show you via display what triggered the alarm. They say the range is up to 1/2 mile from bike to remote. But as you know this range is variable due to conditions and surroundings. I have it set up to where you get about 2 feet from the bike and it will chirp as you get closer it will chirp faster, If you touch the bike or lift it off the stand the alarm sounds and your turn signals flash. Your remote will show you all this. This is a cool system. They have a factory plug in for the Hayabusa so no cutting wires to install. The Main alarm is the size of a box of cigarettes, and the perimeter sensor is the size of a box of matches. Very easy to install.