I'm in the process of tightening up my son's center stand on his 1982 RS. My local dealer says that I need to measure the bushing because there are two different sizes listed. RealOEM says that both choices are superseded by a third one. I looked up the third # and it doesn't look anything like the original(it's a K bike part). I'm confused as to how two different sized parts can be replaced by a single one that doesn't look like either of them. Can anyone shed some light on this?

46521236528 and 46522301704 are the two choices and 46521454038 is the replacement for both.

Thanks
Mark