rear wheel drive

Hi, My rear wheel hub motor was damaged, the original kit was £240, but i dont want to spend that much, I was looking on ebay https://www.ebay.co.uk/itm/223709281350 but i`m not sure what they mean by "Still remain the full 1000W power with no speed control.(Only for Pedal Assist...

Hi everyone, As in the subject line, do you think torque arms are required for conversion kits up to 1500W if DD hub motor is mounted on the rear wheel? I have read a lot of stories where front forks snapped under much stress but did not find much evidence to suggest rear frame bars can't...