Here is information on a lien sale, but I doubt that this situation will apply in your case:

http://www.dmv.ca.gov/pubs/brochures/howto/htvr7.htm

And how to register an OHV:

http://www.dmv.ca.gov/pubs/brochures/howto/htvr19.htm

And if you go to www.dmv.ca.gov you will find all manner of information.

- Carl