@moira @RobynGoodfellow I guess it must have varied then?
The mopeds I had on the lates 70s and 80s were generally capped at 30 unless they had been modified, (there is a big thing in Europe with modifying them for high speed). Capping is pretty easy to remove because it's just a regulator on the carburetor. One moped I owned in the 80s could do 60mph, but on a flat road for 2 miles (modified).
For a machine to legally qualify as a moped they can't exceed 30 mph?