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  1. G

    Yuyang king 40amp controller

    I also tried 2 different motors, one of which is brand new. Very rough, noisy, no acceleration, couldn't go more than 12-14mph under no load. I tried swapping phase wires but the key is to swap the hall sensor wires too.
  2. G

    Yuyang king 40amp controller

    I know how you can fix your controller.I had the same problem with my controller. Fixed it by swapping the blue and green motor phase wires and the blue and green hall sensor wires. Rafe at Calibike gave me the answer.
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