I think you are right. Tolerance must be pretty small on the fitment with such high forces on the axel pinching those inner races. I wonder if there's any precedence for dual double bearings? It is the first time I've seen it.
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-2022 5 speed Templar X Orange, OEM 51T rear sprocket, 14T front sprocket
-NOS 2020 KTM 250SX (2-stroke motocross), less than 10 hours on it
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