I have been restoring my K100LT ABS and changed the oil today. I completed the task without too much fuss and saw the low oil pressure light stayed on. I took everything back off and when I was untwisting the new filter, a seal came off with it, not from the new filter but from the old, BMW filter. I have never seen that happen before, but checking the old filter, sure enough, the seal was not there. Long story short, check your old oil filter to make sure the seal came off with it.