Doing the infamous 450 cam swap in my 2002 YZ426 when I heard a metallic part drop into the case. Was able to pull a single split ring out. I presume it was on the exhaust cam bearing. Question. Are there two of them - one on the intake cam as well? Can't see another one down there. The next question is can I see into that part of the case if the flywheel cover is taken off?