I would assume that the transition from XR400 to YZ 400/426 would be easier then say trying to adapt to the power/handling traits offered by any of the 250 strokes, regardless of make. I have decided to try my hand at local 40+ MX and the XR simply wont cut it. I understand the YZ's offer less low end grunt, compression braking ect then the XR, but I would assume that they still bear a closer riding characteristic then a YZ250 or CR250. Since returning to riding after nearly 20 year absence, all or most of my time has been aboard a mid size thumper. A used machine is the object of my desire.