This actually brought up the old Knight Rider Episode that had a moped. Couple of us found it and were watching it the other day, it's real weird.
Season 3, Ep 18
It was called Knight and Knerd, it featured this "nerd" who rode a white derbi variant TT. He helps and in the end they convert it to black with a little KITT scanning light bar thing, and he gets a KNERD licenseplate to match the KNIGHT. Also gets the babe. obviously.
Funny enough theres a ton of places selling knockoff repro's of the KNERD plate.