Last year when I got the CA plate for my DR which was previously registered in NV, if I remember correctly, The 8th digit in the VIN HAD to be an "A" or an"8" otherwise you're SOL. The fact that you have a 3 is not a good sign... I think AZ has some pretty liberal rules so you're in luck if you can plate it there. I've had good luck getting the VIN inspection takken care of with Sherrifs... they;re sometimes a bit more easy-goiing than street cops.
Another twist for Cali Residents to get a bike street legal would be to get it classified as a homebuit (like people who build a chopper in their garage)...Not sure how that would work on a dirt bike, but it's an idea.