I doubt you'll need this info but I got this from Craig on the Expressly Mopeds forum:
OK. Here's an easier way: go to the Secretary of State's Office and ask for the form to apply for a lost title. DO NOT tell them it's for a moped! DO NOT do a title search! Too much info and state employees tend to get confused.
Just take the form and run! When you get home log onto the S.O.S. web site at www.dcyberdriveillinois.com and look up the fee. I believe it's $63.00 + $38.00 for the plates.
Make copies of your completed forms. Mail the check and the form to Springfield. And wait.
It takes about 6 to 8 weeks for the title and plates to come through...in the mean time keep the copies in your wallet when you ride. If the police were to stop you at least you've got proof the paperwork is in the hands of the state. You must also have proof of insurance - this you can get without a title too.
Yes you can get a driver's license without a title - those are 2 separate issues.
As far as the seller is concerned, a bill of sale listing the VIN and stating that there is no title gets him off the hook.
With the State of IL employees - take the easiest route possible. They know just enough to be dangerous.