FYI from -
http://www.dmv.org/co-colorado/motorcycle-license.php
  • CO Motorcycle Permit Driving Restrictions (Under 18 years old)

    • You may only ride under the supervision of an adult 21 years old or older who also holds a Colorado motorcycle-endorsed driver’s license.
    • If that adult is not your MOST instructor or your parent/guardian, they must have your parent/guardian’s permission.
    • If you are under 16 years old, you may only ride under the direct supervision of your MSF motorcycle instructor.