Heh, you must be looking at the same E-Bay auction as me, then. :) It's so rare to find something for sale in my own state (not to mention having a title!) that I'm hoping it stays in my price range. The savings on shipping and title services would make it worth trying to fix up. (And resell before any irreplaceable parts go bad!)
So far, all I have found for info is a website for people who own Gemini SST minibikes. Apparently, those used a customized version of the Yamaha engine. But those bikes were discontinued in 1972, and the moped is supposed to be several years after that.