That is a tough question to answer without having more information to go on.
That does not sound usual for a 1000 Watt motor. The problem is most likely to be with the battery pack. We recommend testing the battery pack Voltage while stopping the wheel and see if it decreases during this test. A 1 or 2 Volt drop in Voltage is normal, however, anything more than that is not. You may find that the battery pack Voltage drops a lot when the wheel is stopped which would indicate a worn out or faulty battery pack.