I agree that they are not really mopeds because they have 6 gears and no pedals but they are in the same tax bracket in the UK. I should know I've got a derbi and they are the fastest stock 50 except for an RS50 aprilia. Mines great fun though although the guy on that link said 75-80 top speed NO way unless going downhill. Mine does 55mph upright and 60mph (100kph) tucked behind screen. I recommend them though just beware of knackered ones, even if they are built to be thrashed ;)