My manual says 80Nm (official cd bought from Husqvarna) 😅 it's on 85 now.
I greased the splines, always do.
I'll torque it to 100Nm if it comes off again. I was surprised to see 80 in the manual, my 990 was 100 as well.
An undampened sprocket is usually full of holes, so you can lockwire it...