Does anybody know where I can buy a Xr 600 or 650 motor new? I am not sure if the Xr 650 motor will fit my 89 Xr 600 frame, but if it would, I would like to put that motor on my chassis. My mecahnic dosen't want to rebuild my 600 motor, he said it is too expensive: $2000.00! I really want this bike back, but I have to find a way to get it fixed. I would like to just buy a complete new motor and bolt it on and go, it that was possible.Any suggestions?