Beartooth Hwy near the Montana/Wyoming line was where the photo was taken last July. My wind whistle was an anomaly that we never specifically identified. When the shield was full up or down it disappeared. Half way up at around 40MPH it was as loud as a car’s brake sensor when the pads are worn is the best way to describe it. While whistling I could put my hand over the right side windshield hinge opening area and make it stop. We tried taping the opening closed, remounted the shield, and about everything you can think of with no change. The only thing that eliminated the sound was a redirection of the air with my hand while moving. The stock windshield when put back on did not whistle. Don was kind enough to change it out for a different one which corrected the problem. It was easy to tell as soon as I pulled onto the road outside the speedway. Don put the take off windshield on another bike and it did not whistle. No explanation, Twilight Zone strange. Harmonics, resonances, call it what you choose. Cudos to Don and crew for spending so much time with me.