Does anyone know where I can get a 1000 watt Bafang hub motor ready laced into a 20 inch fat rim please. ?
This is a little old and my reply might not be relevant, but if I upgraded the hub motor on my rw4 I'd look at Grin's all-axle or the GMAC. Both are pretty pricy:
https://ebikes.ca/product-info/grin-kits.html
Grin will lace motors in a wheel for you.