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  1. #1
    Junior Member knurn's Avatar
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    May 2008
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    troubleshooting hub motor kit questions

    I have a Grubee (Skyhawk) 48V 500 Watt front hub motor kit. It stopped working after a couple of weeks and minimal usage. I couldn’t find any distributors so I purchased a modified controller. This controller is not a ‘direct fit’ but I think I have it connected properly.

    If I give it throttle and lift the front wheel it will spin but not smoothly - there is some humming and intermittent loss of power. The motor doesn't have enough power to move the bike even without a rider.

    Is it possible to wire the motor directly to the batteries? Is this a good test to determine if the motor is not damaged? If so what wires from the hub motor do I connect directly to the batteries?

    Any other suggestions to systematically test and eliminate the throttle, controller and motor?

  2. #2
    Senior Member
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    Apr 2008
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    Might be in the hall sensors.
    Check out this site, it may give you your answer:
    http://ebikes.ca/troubleshooting.shtml

  3. #3
    Senior Member
    Join Date
    Aug 2008
    Location
    northern ontario
    My Bikes
    schwinn izip @ 55v
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    i'd bet it is the hall sensor wires as well
    just try the different wire combo's
    and no don't hook it up direct
    i believe that only works with brushed dc

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