For those of you looking for something much better than the rubber NOS rollers, I have CNC machined versions out of chromolly steel of both the upper and lower rollers.
They will fit CB/CL/SL motorcycles. Upper roller is a sprocket, lower is a smooth roller. Each have high quality needle roller bearings pressed into them. Upper roller comes with a deformable rivet. Material is chromolly steel. See the following links for purchase.
Not trying to put this down at all but is the inner race in the e-bay listing not finished? You can see machining lines needle bearings like hardened and ground surfaces to have life
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