Hello All Comin on over from the XR250/400 forum and was seeking a little information. I was THINKING about selling my 01 XR400 and possibly buying a XR650, simply because most of my riding is on wide open roads/drag race 2-stroke 250's and have a hard time keeping up. ANYWHO I have a few questions before I do though. My 400 came pretty plugged up upon buying it. By this I mean airbox snorkel, restrictive air filter, Plugged up exhaust, header pipe welds pretty big. I cured all of these problems now have a good "free flowing" system. Much better performance. Is the XR650 the same? What kind of mods need to be done to it? What is this Power Up Kit I keep hearing about? If someone could point me out in the right direction of some good XR650 info, or could explain a little that would be great!! Thank you!!!