I know that State Farm will insure salvaged titled vehicles. I was going to buy a salvaged titled 300ZX Twin Turbo and they were going to give me full coverage. They were going to have it inspected by one of their recommended shops first. But they told me that if I got into an accident that things may be discovered then that weren't discovered at the time of purchase. So you take your chances. And California will register a salvaged title. It must be disclosed up front. But, the owner before you already did it I'm sure. Otherwise you probably wouldn't have know. You can have your insurance company run a VIN check on that bike to see the status. Just tell them you're considering buying it and they should help you out.
Just one question though. With all of the good used bikes that haven't been salvaged, why would you trust your life to something that you know has been put back together. And you cannot be positive that whoever put it back together didn't cut some corners. Most of us push our bikes in an open straight away or out in the back roads. The wrong time to find out about something that the previous owner forgot to tell you is at 100+ MPH. It may be a good deal, but is it really worth it? Something to consider. What ever you do, good luck...........JB