How many miles?
Unless there is over 7500 miles there is nothing you can do to the bike to register it in California. Even adding the proper smog equipment will not matter as they go strictly by the VIN. Don't waste your time or money.
Been there, Done that, Registered in Washington until I pass 7500 miles (only 6000 to go!).
Now there is really one way around which I am going to attempt when my WA registration expires in April. Supposedly, if you have the bike titled and registered in your name in another state they cannot refuse to register it in CA no matter the miles. They also cannot force you to install the smog equipment.
I'll find out how true this is next month. The only thing they could get me on is not actually living in WA even though I maintain it as a second home.