2oz of Symtec and a hand full of BBs. Press the BBs into on side of the clay. Get an electric blasting cap, put it in the clay, and connect it to the output (trigger wire) out a motion sensor. Put the package into a think 21n diameter pipe, with one end capped shut. Aim it across any entry into your bike storage spot about waist high and viola! You'll cut any would be intruder in half when they try to come in!
Just don't forget to build-in a few failsafe measures so it doesn't cut you in half.
Extreme measures for an extreme bike!