jacob9795
I live for the CABE
My cog had a groove worn into one side of each tooth from normal wear. The noise emanates from each chain roller as they lift away from the tooth and worn groove back toward the chain wheel. I carefully used my bench top grinder to make each tooth have a flat profile again, I think I solved the problem, it sounds quieter. Thoughts/opinions? These chain drive systems are usually a bit noisy but they get louder with wear. There are definitely pros/cons to this method versus finding a NOS cog, perhaps it’s a quick fix.