Honda 250es compatibility

[Pyxsii]

Hi everyone :D
I'm not too sure what the heck I'm doing wrong (maybe there just isn't anything out there)
But I'm looking for a compatibility chart/list/whathaveyou for a Honda 250es...specifically a rear axle.
It's not for me (I'm hunting for my brother), I'm venturing into unexplored territory (haven't dealt with a 250 yet, we have 2 Honda 200s, a 90, and a 160 Cow-which I have claimed as mine <3)
I'm not even too sure what models there were in the 250 range....which doesn't help my searching haha...I look on the honda history and can't even find a 250es....soooooo......
I found axles on ebay, and some of them can get pricey.....I know there are OEM ones out there...I found one for a 250R.....but not too sure on the compatibility between R and ES?
Thanks SO much in advance!

[UI Vandal]

Here is a start: 1985-1987 ATC 250sx are different. TRX 250 are different.

[Devilsclaw]

You can look up the part number on various parts sites and then most of them will tell you what ATVs had that part in common. You find the part no. By looking at the diagrams.

[atc007]

If you have a 85, This is easy. You can only use 85 ES or SX. That's it. If it's 86 or 87, All but those 2 85's will work. IE,,86,87 ES,SX,or TRX. Same goes for both hubs. 85 Only ATC's for 85's.. 86 up for the rest. I know this wasn't clear,repost if you didn't understand!