Here's my friend's boardtrack style cruiser. I'm sure the initial reason he purchased the kit was that I had one and it would be something fun to do. But now I think that he really likes these little low speed forms of transportation.
He's working on another bike right now which is an old skip-tooth frame and he's mounting a Maytag washer motor in it. I'll bet a lot of people don't know that once upon a time some Maytage washers came with a little two-stroke boxer twin engine. He's doin some pretty serious mods to the engine to narrow it enough to use on a bicycle. The frame has been lengthened 3" to be able to clear the length of the engine. I'll post some pix of this project soon.
It's kind of funny that he like these very slow motorized bikes. Funny, because recently he set the world landspeed record at Bonneville for a 50cc motorcycle at 144.466mph. On that he' using a hopped up Aprilia 50 engine and it's turbocharged. 20+ hp at 14,500rpm amd 6psi of boost. I've attached a few shots of his record-setting streamliner.