I previously removed the clutch, flywheel and rear main seal so I can replace the crankshaft rear main seal, the flywheel o-ring and the oil pump cover o-ring. You can see how I did that work here:
The inside of the bell housing as well as the shelf under the transmission showed oil leaks, so one, or all, of these are the likely culprits.
When I opened up the oil pump to take measurements and do a visual inspection, I decided that I had to replace the oil pump due to a lot of wear and tear to the rotors inside the pump. You can see how I removed and measured the oil pump here:
When I first got the bike, in debugging a low oil pressure light that came on, I discovered that the oil filter high pressure bypass valve was hanging by a thread. So, unfiltered oil was circulating, but I didn’t know for how long. Based on the condition of the oil pump and the scores I found in the rod bearings, I think unfiltered oil circulated for while. Not what I wanted, but I’m glad I took a look at the pump.
You can read about how I did the work here:
And, you can see a short video that summarizes the work here:
Due to what I found with the oil pump, I’m making a detour on the project. I’m going to pull the crankshaft to inspect the main bearings. I suspect I won’t like what I find there either, but it makes sense to take a look.