I should also mention that when I bought my KTM, it had 16000 miles on it, and did have some clutch drag. I flushed the system, and reflush a couple of times a year. I have not had any drag since.
Many kinds of mineral oil work just fine, but (groan if you must) I have been using brand X baby oil for 5 years, and the clutch works well.
I miss round headlights.
"When I was a young man, I liked to race my horse...." - G.H.W.S. 1878-1962