I have a 79 MX 175. My dad bought it new for me in 79. It was a fantastic bike and still runs today. It wouldn´t beat an RM 250 but there was not a strip mine hill that I wouldnt climb much to the embarrasment of many CR, KX and RM owners that could not climb the same hill. I lived on that bike in my early teen years. It´s a family heirloom today.