I'm trying to replace the steering stem bearing on my 89 NX125. I got the bearings out and the old races of the steering stem, but I can't get the outer races out of the frame. There is a small lip on there, but I can't find anything to get a grip on it with. I even tried a chisel from the other side, but I can't get enough angle and the chisel slips off. Is there some special tool I need to remove these races?