Thanks for all the advice. I tried to find a bushing that would fit, but no luck so far. None of the Yamaha bushings listed the size, so it's hard to know which one will work. The original bushing looks to be 13.5mm ID (shaft diameter) x 18mm OD. I found some oilite bushings that are 12mm ID x 18mm OD but it would cost too much to have a machine shop drill one out. I could do it myself, but my drill press is a POS and I don't have a 17/32 bit (13.5mm = 17/32 inches as it turns out). I'll probably do what PeWe said and buy a used starter. It would've been more satisfying to fix the old one, but $ wins.