This section needs more activity, so here's my 1972 HD with a 1000 watt front hubmotor and 52V Li battery mounted on the original rear rack. I use this for my daily ride to the mailbox, which is a bit over a mile round trip. It has the original rear wheel and 20T sprocket. Crankset is original too, except that I swapped the original 46(?)T chainring for a 42T.