will a xl185 rear sprocket fit on an 83 atc200?

 

I'll attempt to field this one. I used to own an xr185, which had the same motor as the xl185. And, according to my old service manual, the xr185 had the same bottom end as the xr200, and presuming that the ATC200 motor was a takeout of the xr200 (like the 400ex and the xr400r)the sproket should bolt from one to the other, but I'm not sure about sizes, so I sugest comparing them for size, but as far as the splines, I believe they will fit.