I replied in the other thread you posted about the leak pattern being exactly the same as mine. As soon as I replaced the shift shaft seal and sprocket shaft seal the leak went away. Just saying... could be that crack but I would check to see if it leaks without riding the bike in the same spot.
Thanks for the advice, I will check into this again. It seems from the oil location that it is seeping from a crack - not sure how it could travel from the shift seal. But it's worth a shot still.
Thanks,