My bad - you take the triple clamp off, flip it over, drill the heads off the ignition lock bolts, then you can slide the lock out of the triple clamp, and then you use the vice grips to remove what's left of the bolts in the triple clamp. Once the lock is off the clamp, you'll have about 1/4" of the bolt sticking up that you can get hold of. The lock slides over the bolts - the holes in the lock aren't threaded.Holy crap, that's gonna be fun.
It's a race bike, so just gonna remove it for good. They are recessed in there, so not sure how I would get vise grips in there ones I drilled the head off.