Ok, well I still need to see if oil is getting to the PTO (edit) cyl. The fact that it doesn't flow to the crank bearing line makes me want to check.Personally I have never seen oil come out of that location on the XCR 800, I've checked quite a few I have owned several and still have 2, seems to me it's more of an oil return line even though it's Tee'd together..I do NOT believe that is your problem..the other same crankcase triples do not have that line at all, exception is the 99 XCR 700 which has it. All of my big bores do not use that line and they are all made from the 800 XCR crankcases.
Also, I got no difference in exhaust temps which tells me that there isn't a mixture or timing issue going on. Yes, hoping for an easy solution, but not scared to tackle a crank issue if need be.