.....you have the right of way?
Lane splitting is legal in CA., so if a guy suddenly pulls out in front of you, causing you to run into him, the biker is guilty?
It is kind of an unwritten rule in CA that you are responsible for the front of your vehicle and the back of the one in front of you.
If a car pulls out in front of you and you hit squarely on the back bumper, I would expect the biker to be found at fault.
If a car pulls out and your front tire clears the back bumper, then it may be ruled the car's fault.
On my way home last night, I was splitting in and out as the traffic slowed and sped up again. I'll usually file in line around 30 and start to split at around 25 and lower, if it seems the cars are going to keep slow. When I got to my exit, I signaled my lane change and noticed a quickly approaching biker splitting about 30 over everyone's average speed of around 30 (they were going about 60). They flew by as I got into lane 2. I am a bit concerned about those folks hitting me, so splitting has become more challenging due to more mirror time required. I'll usually file in and let the squids pass, if they don't cut over a lane or two and pass that way.
As we've said, there is a safe way to ride a bike and a way to make it unsafe no matter what the laws say can be done.