I got the head, with new valves in it, back on the quad. I fired it up and still it rattles like crazy. Here is what happened to this thing, I think.The motor has issues, but the valves, rocker arms and push rods oil from the top down. Do you have the service manual? If not, PM me an email address and I will see if I can attach a PDF copy and email it to you.
It is not uncommon to see the ring down the side of the piston - part of it depends on the engine design.
Before I put the head on, I drained the oil. Not much came out. 1/2 quart, maybe. Changed the oil filter ( the old one was in backwards :frown2. I put 2.5 quarts in it and I noticed it leaking. :frown2: I think it's coming from the shifter shaft. So, I think the oil leaked out enough to get below the oil seal on the shifter. When I got it, the first thing, like always is check the oil. Didn't show in the dip stick. I put about a cup in it and it was just on the tip of the dip stick. I figured that was enough just to see if it would start. Now, fast forward to today. I cleaned the oil passages in the valve cover by blowing brake cleaner thru them. They all seemed to flow fine. But, the exhaust valve seems to get more oil than the intake and that seems like where the noise is coming from. The intake is getting oil, just not as much as the other one. I wonder if the noise is due to some engine damage due to low oil. It never leaked a drop while sitting in my garage, so whatever leaked out did so somewhere else.