Don't know about the gen 2 but on the gen 1 it's the other way, no washer on the crank case drain but an ali washer on the oil tank drain.
Agree....I have a Gen II (Tuono, so same thing)...NO washer on crankcase. Alui washer on oil tank.
Have a quick look through your KTM parts catalogue...you can get a replacement magnetic crank case drain plug with a proper bolt head rather than the stupid soft as cheese allen that's fitted as oe. About £10 squids.
Thanks for replying - guess what I am doing at the wekend.