I opened the rocker arm cover, on my WD45, and removed the rocker arm assembly, to tap a stuck intake valve loose. when I lifted the rocker arms off, the two rear stands, that the bolts pass thru,fell apart, and were cracked in the area where they wrap around the main shaft. They appear to be cast iron. I don't know what would cause this, but they aren't available in the YT parts. Does any one have a complete rocker arm assembly, they are willing to let go of, or even just the two rear rocker stands? The tractor runs good, on 3 cylinders, so I think it's worth messing with. I will also need them to be shipped to Washington. THANKS RALPH