Thanks for the clarification!Registering:
There are no emissions checks on MCs in CA.
Lane splitting - CHP says
Can motorcycle riders "split" lanes and ride between other vehicles?
Lane splitting by motorcycles is permissible but must be done in a safe and prudent manner.
Safe and prudent as defined by the individual officer. As long as you don't ride like an asshat doing wheelies and going wicked fast most cops will leave you alone. Back when there was a "speed limit" on splitting it was no more than 10 - 15 MPH faster than the cars, not 5.
Get used to driving in CA traffic before you start splitting. Start light with filtering at lights and move up from there. Keep your levers covered. Rinse and repeat.