Hi Hank,
Per Maine's Bureau of motor vehicles website, a title is not issued unless a motorcycle/scooter is over 300cc. Since the scooter I'm selling is 150cc, a title is not needed. You can view the website here:
http://www.maine.gov/sos/bmv/Title/index.htm
What does MCO stand for? When I go to sell the scooter, I was going to complete a bill of sale and also sign over ownership by filling out the back of my registration to the new owner. Is there something else that needs to be filled out when I go to sell it? Thanks, Mike