Put a shim between the yoke & the needle bearing like you did on the side of the sprocket.
It will help reduce the wear on the end of the bearing.
IIRR the initial design of the housings were such as the captive needle bearing was shorter than the housing so axial thrust harmlessly was taken on the housing surface.
As hours operation built up the housing wore for various reasons.
If the end of the bearing that retains the needle rollers wears off, the needles can work out and that is not a good thing.
The engineer did put a cotter on the yoke end of the shaft so the yoke could not get off completely off with loosened set screws, preventing several problems I can think of.
it is a simple design that works & worked much longer than I'm sure they ever dreamed.
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