I'm rebuilding a bike for a friend, 01 cr250r and the transmission shafts bearings are spinning in the cases. One of them I can almost just drop it in, I'm considering using .002 shim stock around the bearing to give it a press fit again. He doesn't want to buy new cases as it's just his mess around bike, so what I'm wondering is, is there an alternative to shimming it or would that be best route? I've measured the hole and bearing so I know what shim to use but thought I'd ask around since I would just buy new..