Steve, Sorry to contradict what some have typed here, but Ca DOES require vehicles to be Ca smog compliant or have 7500 miles or more to register it in this state. As a new resident I found out that my FJR purchased recently needed the obligitory 7500 miles so I brought it to Ca via Montana and now it is registered with over 7500 miles. BTW, do NOT take a 49 state bike down to the DMV with less than 7500 miles showing as it will get blacklisted via VIN and cannot EVER be registered in Ca. (info from CHP) Great excuse to tell the Mrs. when moving that you need to ride it out!
JW
https://www.dmv.ca.gov/pubs/brochures/howto/htvr9.htm
Thank you for the info, JW. I hadn't bothered to check whether there might be an exception, since I intended to have 7500 on both bikes when I registered them. Now that I've read that guidance material in the link you posted, I'm that much more determined to have the necessary miles. The FJR is beyond the requirement, but the XX is just shy of 6500 today. Going on an FJR mountain passes ride this Friday, but I'm riding the XX, just for that reason.
Note however, that the section in the Health and safety code that is referenced, H & S Section 4351, has an exemption at subdivision c. While I'm not at all sure what "a certificate of conformity issued pursuant to the Clean Air Act (42 U.S.C. Sec. 7401 et seq.)" consists of, that subdivision makes it clear that if your vehicle has such a certificate, and you originally bought the vehicle in another state when you were a resident there, you're exempt. NOT that I'd want to have to argue the point to a California DMV counterperson (compared to my experience in other states, our CA DMV folks seem to be the most officious, unfriendly, unhelpful and nasty bureaucrats anywhere).
Again, thanks for the info.