Kelly,
Did you ever figure out the problem? Mine seems to be shaking alot around 50mph with hands off the bars, mildly at 40 with hands off the bars. No mods here at all. Tire pressures 29F, 32R cold to the touch, very cold this week. Rear wheel aligned by the count the threads and measure the threads in mm (redundant I know). Steering stem at 32 ft lbs. Thinking rear tire as I now have 8,200 miles and center is looking a bit flat.
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