ETZ clutch drag

Hello again
I have had the problem of clutch drag in my bike for a long time. When I pull the clutch lever down the clutch is still "on", it does not release completely. It has bothered me a long time and last time I rode the bike (few years ago) it started slipping.
Now I have replased all clutch plates and springs and took the engine back to the bike hoping for the best. But no luck, the problem is still there. The "Stellschraube" is on use everybit and the center of "Verbindungsstück mit Zugspindel" is 11mm from the engine casing.
I really do not know what else to do. Is there any other way to adjust the clutch?
Otherwise I have to dump the bike to some swamp and buy something japanese instead. Or a bmw.
edit. sorry I forgot, the springs were not renewed. Maybe they should have been?
I have had the problem of clutch drag in my bike for a long time. When I pull the clutch lever down the clutch is still "on", it does not release completely. It has bothered me a long time and last time I rode the bike (few years ago) it started slipping.
Now I have replased all clutch plates and springs and took the engine back to the bike hoping for the best. But no luck, the problem is still there. The "Stellschraube" is on use everybit and the center of "Verbindungsstück mit Zugspindel" is 11mm from the engine casing.
I really do not know what else to do. Is there any other way to adjust the clutch?
Otherwise I have to dump the bike to some swamp and buy something japanese instead. Or a bmw.

edit. sorry I forgot, the springs were not renewed. Maybe they should have been?