I currently have:
A 1970s Derbi GT4V (it will look like this once re-built) Is a 4 speed 50cc Spanish Moped (my first road bike in 1979) and unrestricted so would beat Fizzies, SS50s and keep up with AP50s all day long.

and a blue Derbi Coyote 4V (again it will look like this once re-built) Same frame and engine as the GT4V, but with a fibreglass all-in-one seat and tank unit, raised exhaust pipe, taller wheels with knobblies, different rear light and aluminium mudguards as opposed to the chrome ones on the GT4V.

Cheers