Theres a heap of these on youtube - pans, knucks etc.

 

http://www.youtube.com/watch?v=EQRzCNK9eOs&feature=related

 

 

very clever

I lived in Thailand for years and most of the time I rode around on one of those 110cc step thru Hondas.
It would be great to see someone put an engine like that in one of them!

going to do a bit of research, from what I can gather some build their own from scratch the talented buggers, and for others there is kits available.
I'll post up what I find out in case any one reckons they would look good sitting on the bar.

http://www.craftsmanshipmuseum.com/Kieffer4.htm