I was installing my rear wheel and adjusting the chain when I noticed that when I checked the chain slack by pulling the chain down at midpoint that I would get a very slight clunk. The rear wheel was off the ground as I had the swing arm supported by a pit stand. I could feel a very tiny amount of movement at the swingarm pivot for and aft. Also, if I put a small prybar between the swingarm and frame I could move the swingarm left to right approximately 1mm. It looks like the inner bearing race is moving within the bearing. Is this normal? Am I missing side spacers?