Well, on my CB550 motor rebuild, I didn't have the left side crank seal settled perfect (you need to have them on the crank when putting the halves together, they have a retention lip) and I had to juggle it a bit after lifting the cases oh so slightly..................
Sleepless nights ensued. I just cracked my cases back apart, I couldn't take it anymore.
My OCD actually paid off! The helical spring that applies constant pressure to the inner seal had popped off and was just sitting there adjacent to the seal. The shoulder is tiny, and it popped out when I juggled the seal. 5 will get you 10 that she would have started leaking after 200 miles.
See that silver colored ring sitting to the left of the seal? That is WRONG.
