maybe this could be a loophole.
5031. An application by a person other than a manufacturer or
dealer for a license plate for a motorized bicycle shall include all
the following:
(a) The true, full name and the driver's license or identification
card number, if any, of the owner.
(b) A description of the motorized bicycle, including any
distinctive marks or features.
(c) Other information as may reasonably be required by the
department to determine whether a license plate shall be issued for
the motorized bicycle.
5032. (a) The application for a special license plate for a
motorized bicycle shall be made before the motorized bicycle is
operated or moved upon a highway, except that, upon the retail sale
of a motorized bicycle when there is no license plate, the operator
may operate the motorized bicycle for a period of five days from and
including the date of sale, at which time application shall be made
to the department for a special license plate. If the fifth day
should fall on Saturday, Sunday, or a holiday, the application shall
be made on the first business day thereafter.
(b) The five-day operating provision set forth in subdivision (a)
shall apply only if the operator has in his immediate possession
evidence that the motorized bicycle was purchased within the last
five days including the date of sale.
5033. Upon proper application and payment of the fees specified in
Section 5036, the department shall issue a special license plate and
an identification card for the motorized bicycle for which
application was made. Applications may be submitted by mail unless
the department determines that it is not feasible to complete the
identification process by such method.
http://www.leginfo.ca.gov/cgi-bin/displaycode?section=veh&group=05001-06000&file=5030-5039
Good luck!