The main reason I changed the sprocket was for hiway cruising, it dropped the rpms down by about 1k from 6k to 5k at 110 kmph which is about 68 mph. I have checked it with a GPS and my speedo is right on the money, before I was about 10kmph out. You will lose a bit of acceleration, not much it still pulls very hard. As far as top end, I couldn't say I have never had it to its max speed, my drivers license and bike are too important to me to lose just to see how fast it will go. I personally like the difference in its cruising RPM the bike has lots of torque to compensate for the higher gear ratio and doesn't seem to work as hard.