Look into the bully high security alarm u lock with pager function. For $150, it seems like a good deal. I dont know if it will function without the shackle in (the alarm part i mean, but if it does, it could be hidden on the bike and just used as an alarm with a pager if you had other locks you prefer or whatnot. I will ne getting one of those fornmy rig when its ready to get on the road,. Will let you guys knownhow it works out.