Got a note from Derek about a trip he took to Seattle. He was walking down the street and came across this really interesting home built bicycle conversion locked up in front of a theater in the university district. The owner and/or builder was obviously using it for around town transportation and Derek thought it was a great example of the type of small displacement homemade scooters he saw much more of in the west than back east. In fact, he observed it wasn't until he was west of Denver that he really started to see scooters and mopeds anywhere.
From the photos, it appears this
moped/scooter/mini motorcycle (NOT a moped, no pedals) is powered by a liquid cooled Polini 2 stroke engine, the frame may have started life as some sort of BMX unit with various parts and pieces found, made or modified to serve the needs of the build.
He had no info about the bike other than what you can glean from the photos but, like Derek, I think it shows some real ingenuity on the part of whoever built this. If anyone from Seattle recognizes this bike, maybe even the builder, we would be glad to hear a few more details. Pretty cool example of the kind of really inexpensive build you can create with a little outside the box thinking.
Thanks for the photos, Derek!
UPDATE: I changed the title of this post and removed the word moped. I agree with the comments, without pedals it isn't a moped.