Okay, so I purchased them and installed 14GR sliders and have been riding on them a few days. TANware is right on, not that I doubted, which is why I bought them. The bike generally feels a tad more responsive, noticeable acceleration through the mid range, and less vibration when cruising over 70. Acceleration over 70 feels about the same to me. I haven't tired taking a mountain grade at 80, so no idea how that's affected. At slower speeds it feels a tad more revved up. If most of your driving is at slower speeds and you like a more leisurely drive around down, don't bother. Overall, I'm happy I did it and found I got use the the differences real quick and am loving that mid range acceleration. Now if I could do something about that seat, or rather the leg room, really not comfortable for me after about an hour.