Original DR-Z400 clutch arm.
This is a common modification if you want to soften the clutch pull a bit on your Suzuki DR650.
 
A common trick known by DR riders is to swap the stock clutch release arm for a DR-Z400 one. It uses the same splines, but it is slightly longer, softening the pull needed to operate the clutch.
 
It's a quick 10-minute job. Just make sure to remove all the slack when re-installing.
 
Note: Depending on your clutch cable, the DR-Z arm's groove might need to be opened a little to allow a frictionless passage for the cable.
 
This is a Suzuki Genuine Parts:
23271-20902-000 ARM, CLUTCH RELEASE