I'd love to know what alarm people have on their 899. My insurance company requires an alarm that has 3 of the following 5 features: immobilizer (which I assume I don't have to worry about since I believe the bike comes with that with the key), battery back-up, audio alarm, motion detector, GPS. So really, I want an loud audio alarm with an motion detector. I was thinking of putting a Gorilla alarm or Scorpion or Ducati alarm (which I assume would be the most expensive option). In part, I need to know what alarm will fit on the bike and will not interfere with the bike's warranty.