Well, the two fasteners that hold the switch to the bracket look like some kind of rivet. There are four normal torx screws that hold the bracket to the bottom of the top triple tree. I just took those out and replaced the bracket and all.
That's because they are security break off bolts.
Lesson two a prick punch is sharper usually used to locate a position. Then a center punch is used to have a more permanent mark. (Once you are sure the price punch location is correct)
Anyway Fred think how do I remove a broken bolt. I just need to unscrew it if the threads aren't damaged.