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Old 09-13-08, 02:06 PM   #1
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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?
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Old 09-15-08, 08:23 PM   #2
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Might be in the hall sensors.
Check out this site, it may give you your answer:
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Old 09-15-08, 09:53 PM   #3
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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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