Parts! My front tire came in the mail, but the rear tire hasn't shown up yet.
Haven't done much except measure the motor, then research/shop for sprockets and chain.
As I remembered correctly, permanent magnet motors are definitely not free-spinning when unpowered, so I had to do some thinking about how to add an overrunning clutch cheaply. I'm going to be buying a bike hub that I can cut apart to build my own.