I'm already missing my moped, nick :(
hehe.. nah its ok, I'll get another one soon and we'll ride SOMEDAY
You dont need leaded fuel for the moped. It is an old warning because in the past unleaded fuel had some harsh chemicals in it, or so I've heard. Just make sure you put the right ratio of premix in it.
if you feel the desire to put in some lead substitute anyway, I have a bottle of lead substitute I could give you but it wont accomplish anything. I tried it for one tankful and nothing was any better, but who knows.. =)