Rob from E-MTB forums in the UK has an interesting channel and he just released this video today. He put together a build I think that will help many DIY folks. So, thought of sharing it here. Hope it helps.
Great looking bike. The subsequent review was interesting too. I do wish he had chosen an Ultra to test. But it does bring up an interesting point. Watts doesn't equal torque or hp. I wish Bosh or Yamaha came out with a nominal 750 for the US/offroad market.