Well the threads are 8mm. I would find threaded rod just a little longer than the original stud, put some green or red loctite on it. Make sure the hole and stud are grease free. Put the loctite on it and thread that thing in good as you can and let it setup for a day. Make sure it does not go where you are putting on the nut. If not, like codey said, we can help you out. I have all the drills,taps,handles, everything too. Plus, I think I can tear your motor down for you.