Just out of morbid curiosity, what do the other rod journals and bearings look like? What about the main journals and bearings? Was this due to a general loss of oil pressure, or was it a blockage only affecting the one bearing?
Ive always wondered the same thing ever since I got the bike/motor. When I first got it there was signs of a grinded up clutch set which I replaced from the beginning. After that and many oil changes to remove old gunk from the motor I have been chasing this sound which has been getting progressively worse and left me stranded on the road twice.
The only sign or clue I can see is that all the other three rod bearings show signs of wear or debris right in the centers where there fed oil. Im thinking there must have been some contamination or unfiltered oil fed to the rods. The confusing part is all of the main bearings look great which get fed from the same oil supply but they all have the center grove where the rods don't.
On another note all of the oil passages look perfect as well as the passages in the crank. I was expecting to find something very obvious but so far nothing. I guess only the previous owner will ever know what did all this and which is probably why he parked it and moved on.
