The service report said to rotate and balance. I was not surprised. It felt like a prescription for me. I had been juggling items, seemingly spinning in place, and emphasizing too much of one thing and not enough of another. Life gets like that sometimes. My car, Scooter, was in the same predicament. We both would run a lot more smoothly with a rotation and balance. I love it when Scooter and I learn these important things together!