I usually register in AZ non resident for all my off-road and watercraft for a year, then it’s just a title transfer….all the pain and suffering avoided.
CA sees transfers different from purchases. No sales tax responsibility or any of that mess.
Really easy to get AZ registration without any funny business. If you “ride more than half” in havasu or anywhere in AZ you just pay the 75$ and you’re done even with a CA address and drivers license.