How do I transfer ownership of a motorcycle bought from a Thai person as a foreigner in Thailand?

To transfer ownership of a motorcycle you bought from a Thai seller, you need to visit the Department of Land Transport (DLT) in your provincial capital. Gather necessary documents including a bill of sale, signed copies of both yours and the seller’s Thai ID, a residence certificate from immigration, and the green book. Ensure that the bill of sale is witnessed by two individuals not involved in the transaction. There may also be additional requirements like power of attorney forms for plate changes and registration.