Was just out in the garage messing with an old xr 185 motor I have and noticed the front sprocket will bolt right up to my 200s if I use the xr's sprocket lock or plate whatever u call it. Was extremely happy cause now I can get front sprockets up to 16 instead of 12 and 13 if lucky. Just thought I'd let everyone know cause it gives us a lot more gearing options. This swap should also work on the plain 185, 200, 200s, and 200m.anyway hope this helps some else out to.