To Provide them with the VIN, and they should be able to retrieve the key code information for you.
Locksmith: You can also consult a locksmith who specializes in motorcycles. They may have the necessary tools and knowledge to help you determine the key code for your Kawasaki Vulcan 500. They might be able to decode the lock or use other methods to obtain the key code.
It's worth noting that the key code is typically used for ordering replacement keys, so if you need a new key, you may need to provide the key code to the dealership or locksmith.