You can see the project here:
With a Kelly Controller set at 50 amps I have pulled 50 mph as a top speed, but I've geared it lower so the top speed is now 30 mph. (changing the gearing is easy, just get a smaller rear sprocket for $10)
The throttle needs replacement... the hall sensor went out. Plus you have two controllers to pick from.
Currently the bike sits in pieces in my mother's garage and she is in declining health (in a wheelchair) and making a rather sudden move to a nursing facility. I live in Wisconsin these days.
So the price is a fraction of the effort put into it. (literally years)
If you want a fun project at a good price this could be for you.
Email through Craigslist