The Colorado DMV doesn't approve just any scooter brand for title, registration and plates. They have to be on the official DMV approved list. If your new scooter isn't on the list, you're going to cry a river.
Colorado and the USA has been flooded with mainland chinese scooters the past five years. Many did not meet Environmental Protection Agency (EPA) or the United States Department of Transportation (US DOT) safety standards.
The National Highway Traffic Safety Administration has something to say on their legal importation and on-road worthiness too at http://www.nhtsa.gov/cars/rules/import/faq%20site/pages/page3.html
Without the proper documents for your scooter, the DMV won't register it. Period.
Before purchasing a scooter, ask the dealer or seller many questions. They should be able to give you a Certificate of Origin or a title. It's a good idea to call the DMV before finalizing any scooter sale too.
Once purchased, be sure to register it right away. The fine for riding around on an unregistered scooter is north of $500.
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