This video shows how to repair flat on a rear wheel of an electric scooter with an electric hub motor. One of the intereting things in this video is his idea of using a plastic circular 5 gallon bucket cut in the middle, as a place to lay the hub wheel down on while fixing the tire and tube, and keeping the wires coming out of the hub motor from being damaged. I think this may be good idea for doing repair work on the hub motor as well.
[youtube]vOZlsGRtCN0[/youtube]

[youtube]vOZlsGRtCN0[/youtube]