Fitment: Yamaha
Key Number: 390
The ignition key number is a 3 digit number stamped both into the key itself & on one of the flat surfaces on the ignition switch. To determine your key number simply look at the key (you may have to pull the boot/cover back) or find the 3 digit number on the side of the ignition switch.
![SCREW, TRIM CYLINDER END [4D6]](https://www.marinerailparts.com/wp-content/uploads/2026/10/screw-trim-cylinder-end-4d6.webp)
