Really love the idea of getting around on a motorized bicycle. I've had motorcycles from 50cc to around 550cc, but somehow with the skinny bicycle tires, marginal brakes, put-put of the engine, and little-to-no-suspension makes it feel like what it must have been like when these were the fastest things around.
Here's my current ride. It is a 50's-60's Columbia frame labeled Goodyear HiWay Patrol. It has a detuned 125cc Zundapp motor with its gearbox hacked off. It runs a friction drive and idling goes about 10-12 mph. It has only a coaster brake that doesn't seem to funtion at all. I know if it were to run properly it would be scary-fast. I just use it around town.