XR200R motor conversion into the 125 chassis was going great until this little hang up. The intake manifold for the 200R carburator will not work in the 125 frame. Looks like I'll be fabbing one up.... Update 7/14/2011: I learned that a twin shock XR200 manifold (1979-1984) would work for this. I located one, installed it and have an off the shelf solution to this problem. Saved me a bit of trouble.