Basic tire balance and the wheel going back on.
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DOT over here had a tire balancing rig that`d spin the tire up to probably about 50 or 60 MPH, not sure but it was pretty fast.
A mark was made on the tire before spinning and there was a timing light affair with a sensor on it that hooked to the axle, tire was spun, then take note of the position of the mark while tire was spinning. stop tire from spinning, roll it around until mark is in position as seen when spinning and place a weight at the top, 12 oclock position. Pretty nice and very precise.
One of the mechs, on a weekend, used the machine on His Harley. I imagine that was a pretty smooth ride after that.