I just did a Google search on SCEM.
Didn't really come up with much. There are claims on wikipedia that the dl650 has it, but I don't think mine does. Perhaps the gladius motor and probably the 2012+ Dl650 do. Now I'm wondering if I should deglaze the cylinders.......
I did start cleaning up the heads, valves and seats today. Amazing deposits of carbon and burnt oil. I suspect thats where my vibration and lack of power was coming from. Either preignition from the deposits, or low compression from crud in the seats.
After reading about the hard coating on the valves, i was afraid to lap them even. I removed the valves to clean up carbon built up on the stems. After the clean-up I checked the fitment with Prussian Blue. They checked good.