The clutch nut lock washer on your Suzuki DR650 is a small but important part that should be replaced once in a while. It is living a hard life, being bent back and forth when working on the clutch.
 
Over time, repeated folding can weaken the metal, reducing its ability to properly lock the clutch nut in place. This genuine Suzuki washer is a direct replacement—simple, effective, and reliable. Always good to have a spare on hand.
 
This is Suzuki Genuine Parts:
09169-20005-000 WASHER