Thanks for your help. I guess I'll keep the dual wheel setup.I have never owned one of those but I would assume some sort of mini bike rear wheel and brake setup would work. That's going to be trial and error. See what you can find on your local selling apps in used condition.
I rode one with the double back wheel it was sketchy to say the least I don't understand how people can think it's going to be more stable like that??? It would definitely be worth the trouble too fabricate some way of putting pit bike wheels or mini bike wheels on it and locking out the rear suspension turning it into a hardtail.Them dual wheels are dangerous, have to lean right to go left, is ok in a straight line. If you find a wide Cateye rear wheel, you can make your own axle spacers from water pipe or....... might have a different disc and make your own brake bracket.. Depends on how mechanical you are and what tools you have to work with.