Rocker oiling or lack of .

There are oiling holes on bothe sides of these shafts .
That's why you have to be careful of the way you Orient it so the tiny holes or banana holes or towards the bottom and towards the outside of the engine...
But again my point was in response to post number 13 that no matter which way they go they should still receive oil even if you screw up and put them on wrong they should still receive oil because all five of those holes go all the way through and they're much larger than the bolts that go through them...