Yamaha FS1 E changed the image of mopeds in the UK in the 70's. In those days a bike under 50cc, with pedals (moped) could be used legally at 16 years old, but all the mopeds looked uncool.
Then this came along ...
UK law has changed, and a moped doesn't need pedals now - just under 50cc and restricted power output IIRC.