By TOP: You are right it not a lot of room get it out that why I was wondering it was possible go that route. Ialso see what was said about reaching The bottom of the oil pan. I just don't want to pull that pan. I have not inside that clutch housing any idea?
I don't know what you mean by that last sentence. Can you use vice grips on the drain plug? If necessary, you could use a file or hacksaw or something to shape the drain plug head. Also, for easier access, put the motorcycle on the side stand, then put it back on the center stand to drain the oil after loosening it. And I agree with Hugojose, plus draining the oil probably removes more of the yucky stuff at the bottom if there is some of that.
1981 KZ650-CSR. Competition, Sports & Road.