There is a rattling sound that comes from the rear sprocket area when I accelerate. So I took the rear wheel off to inspect the problem, and I noticed that the spacer in between the two hub bearings had no grease on it and it had a abnormal score on one side of it. I greased it up real good and put it all back together. The sound went away for a little while but it just seemed to come back today. I figured that the scoring came from not having any grease but I guess it's something else. I know my belt is tight to specs. Any info????

