I pulled the motor because I suspected a failing valve seat on the #3ex.. I had to back off the adjuster to get the gap set right and it was 1.5 mm futher backed out than the rest.
After I got the head off I noticed oil sitting in cyl. #4 on the top side of the pist..
upon further inspection it looks like there was a lot of blow by.
It's a little hard to tell in the pics. but the head chambers are black as heck.
Funny thing is, the #3ex. looks fine