Where is the ID number on a Yamaha jet ski?

The ID number, or Hull Identification Number (HIN), on a Yamaha jet ski is typically found on the transom, which is the rear part of the watercraft. It's usually located on the starboard (right) side, either molded into the hull or affixed with a label. You can also find the HIN in the owner's manual or registration documents. Always ensure it's easily visible for identification and registration purposes.