I came up with an idea for a solenoid actuated under-seat device with a de-activation timer that must be disarmed or the device will actuate within about 2 minutes from ignition on. The solenoid plunger is mounted in the space immediately under the rider's seat, next to the oil tank (plenty of space in there); plunger is 6" long, tip is very sharp. De-activation switch can be hidden anywhere on the bike. They might get away with your bike, but they probably won't get far.