Ventura County BMW in Newbury Park has been good for parts and accessories tho expensive. They have a good reputation for service and support. George is the man to see there if you want to purchase a bike.
"Run don't Walk" away from West Valley Cycles in the San Fernando Valley. The crazy woman who runs the place will tell you "she doesn't want you for a customer" if you try to negotiate a deal or question her products (I'm talking from experience).
Then, while at WFO on my way up a dune, I understood. It was like the heavens opened up and I heard the voices of Angels.
Shortly afterward, I heard the voice of God. He said, and I quote, "Dumbass."