Can you register a motorcycle in ca with bill of sale?

In the State of California, you can register a motorcycle with a bill of sale, but you will also need other supporting documents. Here is a list of what you will need to bring to the California DMV:

- Original title, or if that is not available, a properly endorsed California Certificate of Title (REG 227).

- Original odometer disclosure statement

- A California emissions certificate of compliance

- A completed Application for Title or Registration (REG 343).

- A valid California driver’s license or ID card.

- Proof of insurance.

- Payment for the registration fees, title transfer fees, and any applicable taxes.

Please note that these requirements may change, so it's always a good idea to check with the California DMV directly to confirm the most up-to-date information before you go to register your motorcycle.