KTLA has a great story that helps sort out what kinds of vehicles need licenses, helmets and have age requirements and which are free-for-all. There is not only confusion about where and who can ride these two-wheelers, but injuries are reaching epidemic levels according to a plastic surgeon interviews for this report. Read it here.
And just for the sake of clarity, from the DMV website, here is a handy guide to help identify the vehicles. Drive safely.
