mudmonster

Hi, I broke the exhaust bracket off the frame of my Fantic 200 (early model, rear kick start) and need to weld it back on. I tried several places locally, but no-one seems to have gas welding kit anymore so electric welding(mig or tig) seems the only option. I'm concerned about zapping the generator or electronics on my bike. Is it enough to disconnect the wiring, or do I need to remove everything to be on the safe side (I hope not, as I don't have a flywheel puller) Your advice please gents.