I know this is not the question that was presented, but I wonder if a vault is a good idea. If a thief is going to try to steal from a bike I would expect them to do damage to the bike trying to get at whatever is locked in the vault. I have the same attitude about my convertibles. I try to keep the top down when parked because I keep nothing in the car more valuable that the cost of replacing the top. Why put someone in the position of taking a pocket knife to the top to see what is inside to steal?
I would vote not guilty if I were on a jury trying someone for cleansing the gene pool of a thief and I would not hesitate to take such action myself if I caught someone stealing from my bike or car. I still think it is best to keep the valuable stuff with you so some idiot thief does not do several thousand dollars in damage trying to get at what ever he thinks might be hidden.
Food for thought.
Bob Harris