The countershaft is the lower of the 2 above, and the output is on the left. The section shows the sprocket and its retainer, and the chain.
Having a closer look at the lube system. Apparently we have a pressurised feed to the countershaft from the crank case between the seal and bearing. The above diagrams don't seem to confirm that though. It then goes into the shaft and out at appropriate locations. I'm not convinced its blocked in any way, but I guess I can't be certain. I think the ease with which the replacement seals went in is the clue. There is also no play in the cs bearing FWIW. There is however no doubt that there is pressurised oil behind the seal.