Hey guys, I am about to take delivery on a winter prject and I am trying to get some part together. The upper is from a tz250 but I am not sure what year, and I am looking for a wind screen. My question is, what year is this upper? and more importantly how interchangeable are the screens. Please check the link below. Thanks in advance. http://www.inficad.com/~wnielsen/mike/Image009.jpg