I have accepted the Dyna clunk as a given when riding across railroad tracks and such. I always thought the sound was coming from the front forks but now I am not so sure. I was doing a little cleaning and noticed that my gas tank will rock a little and it seems to be only in the front mount. I checked the front and rear mount bolts and they are good and tight. The front bolt goes through a horizontal tube that is welded to the frame and it looks to me like there is a little play that allows the tank to rock. I was just wondering if "they all do this" or if I am cursed with an anomaly like I usually am. I can't believe it took me three years to notice this.