We have genuine Suzuki OEM gaskets for the Gear Shift Cover of your Suzuki DR650.
 
This gasket can be easily damaged when you remove the gear cover if you need to fix or check anything on that side.
 
You can be either lucky and could remove the cover without tearing it apart or unlucky and you will need to remove the old gasket and install a new one.
 
So it's a good idea to have a gasket handy before you start removing the cover, just in case you are unlucky with it! 
 
This is a Suzuki Genuine Parts:
11485-12D01-000 GASKET, GEAR SHIFT COVER