I am in the middle of tearing down my dads 450 (for much needed grease/valve check), and my steering stem bearings need to be replaced. The steering is noticeably affected by the bearings, but can I replace just the bearings and clean off the races real well? Do I need to replace the races as well? I know that replacing them would be ideal, but the ones on there don't look that bad, its the bearings that have alot of play in them. Also, do I need a special tool to get the races out and back in? I tried to knock them out with a screwdriver and rubber mallet, but it just slipped off.