California motorized bicycle riders have it made.
Mail $20 to the DMV to get a lifetime Moped / motorized bicycle plate
that not only makes you legal.
The plate # is linked to the serial # on your bicycle making a theft
of your motorized bike a much more serious crime that the cops may
pay more attention to because it is a registered vehicle.
Plate comes with an ID card that you have to carry a copy of when
you ride that lists the bikes serial #, the engine # and of course
your name and address.
Do make copies of the ID to carry because it will cost you $20 to
replace if you lose the original.