It&#x27;s a legal classification. Most US states designate a &quot;Moped&quot; as a 2-wheeled vehicle under 50cc and electronically limited to a top speed of 30mph.<p>In NH Registering such a vehicle costs about $5 and gives you a license plate that says &quot;MOPED&quot; and can be driven by people with special moped licenses if they do not yet have their drivers license.<p>Anything over 50cc&#x2F;30mph and you need a &quot;MOTORCYCLE&quot; registration and license plate and must take the motorcycle test to get a motorcycle license. Most motorcycle registrations are much more than $5. ($50-200)<p>In CT it used to be the case that you didn&#x27;t even need to register it if it was under 50cc, but that might have changed.