Several of us have had this issue. Mine was at speeds of 44-46 mph. Take your hands off and wow it can get scary looking the way the bars go crazy. But put just one pinky finger on the bars to stabilize and it’s smooth as can be. Talking to several members here about this and some had videos. We have came to a conclusion that it could be 1 of 3 things. 1 bad, worn, out of balance tires. This is the most expensive possibility. Some installed centramatic balancers and the issue went away and some got new tires all together. 2 the steering nut and bearings can be loose. The easiest way to check this is to put the bike on center stand, raise the bike to where the front tires comes of the ground and pull up and down to feel any play in the front bearings. Fred and max have had several bikes come in with this issue when they are installing the upgraded suspension parts. 3 which was the cure for my shaking, is the right side steering tie rod ball joints were worn. At 5k mine were shot. Traxxion sells a set of pins that lock your front steering into place so that you can check for free play in the steering linkages. I purchased the traxxion dynamics steering tie rod bar and it completely eliminated my shaking. My tires are about shot as well and still not steering wobble in the bars. The traxxion steering rod will last forever. It’s made with high quality ball joints.