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I would like to swap my rear fat bike 250 hub motor for 500w for a bit more power going up hill. Can I get away with just swapping the motor? Or do I need to swap any other parts at the same time, like the controller and LCD display Im told the current kit is Bafang! Has anyone else done this...

Hopefully someone can help! I have a rocket 88, which is similar to a Super 73 / mario ebike with a 250 hub motor. I bought it new from the Uk but it was made in China. I tried (unsucsefully) to swap the headlight (I bought the wrong voltage light). Got a few sparks so I put the old one back...