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Bafang BBS02 No Pedal Assist after Changing axel ball bearings

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    Bafang BBS02 No Pedal Assist after Changing axel ball bearings

    I changed the axel ball bearings on my BBS02 and afterward there is no power on pedal assist. The motor runs fine with the throttle. The bearings were changed on the bike with no disturbance to wires, connectors, or anything electrical that I could see. I then installed a new PAS sensor on the axel gear to see if this would help. The weirdest thing happened. Now I have pedal assist on 1/2 of the pedal stroke? In other words, the assist goes on/off with every stroke. Any ideas will be greatly appreciated. RogerK

    #2
    Maybe missing some magnets on the cadence sensor magnet ring or it's on crooked?

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      #3
      Ya a clearance issue is what I was thinking. If which side goes in isn't clearly marked I would also try flipping it.

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