Hi Josh, welcome to Ninjette!
Sorry to hear about your bike. Thieves are lowest form of scum!
Easiest to remove the upper triple-clamp so it can be clamped in vise. Then what you can do is drill out remaining secuity bolt. Use punch to make divot in centre and cobalt drill bit will remove it easily. Then remove old ignition.
Tap holes for regular bolts to install new ignition. A locksmith can re-key your new ignition with wafers from your old ignition so your previous keys can operate all locks on bike.
