My Whizzer has an H engine that was made around 1946 and a Columbia bike made in the late 40s. I purchased the engine and bike separately a couple years ago and have been slowly restoring the engine and bike. I have ridden it several times. There is a video on YouTube:
http://www.youtube.com/watch?v=O-1Y6W4yEzc
The video shows me riding it for the first time. There were some mechanical problems with the brake. I couldn't stop because the clutch wasn't working, which created a pretty funny video with over 7500 views. My wife was contributing to the humor as she was taking the video.
This is still a work in progress. I am currently trying to get a new rear wheel, since the old Columbia had pretty bad rims, which made a bumpy ride. I replaced the front wheel with a new Huffy heavy duty wheel with Sturmey Archer drum brake. I'll probably do the same with the rear wheel. Getting good Whizzer wheels at a decent price have been a long and futile effort. This leaves the whizzer as a vintage bike with new wheels, and some new repro parts from Memory Lane Classics.
I still haven't gotten a title and license. I may get this bike legalized someday. For now, I take a run around the block a couple times a month.
Jerry