All one has to do is watch Youtube videos on how easy it is to Steal a Motorcycle. It will make the hair stand up on the back of your head. I need peace of mind so I did some homework on the available alarms. I chose the Scorpio SR-I 900 with the optional Perimeter Sensor. Don't buy the optional factory connector kit. The supplied connectors work perfect and make for a clean install. See in the top left of picture one. The 4 connectors connecting to signals tail and ground. They recommend that the antenna to be installed straight up. I brought the single wire antenna down into the tool compartment secured it with duct tape right where the antenna leads starts off from the wire. They want you to keep the antenna away from metal so I secured it to the harness with green tie wraps. See picture one right side.
Picture two shows how well the system fits under the seat. Inside the plastic bag is the Optional Perimeter Sensor. I put it in the plastic bag because it's not water proof. Secure it under the rubber battery strap. There is a sensitivity adjustment start out with it in the factory setting. I increased the sensitivity on the original install. I made it too sensitive and dialed it back today.
After originally installing the system I thought it was broke. You have to leave the remote 10 feet away from the bike for it to alarm. They do this because the default setting is to stay armed. When your within 10 feet of the system it detects the remote and won't sound. Nice feature.
The coolest feature of this system is the system will page you within half of a mile to the remote. It will buzz and chirp.
The Perimeter alarm works great. If you get up on the bike it will chirp. Stay to long and the alarm will sound.