Well, after the 2600 mile trip, I have to say I was very happy with the performance of my motor. It pulled real strong at all ranges and was great in the mountains even when getting the RPM's lower than planned on some roads. Jeff (Black Diamond) and I played some, nothing serious as far as a actual race, just side by side rolling on, and we both agreed that they ran almost dead even. That was with his 117" Road King. I have a little less rider weight than he, but my bike is heavier than his by more than the difference in our weights. He has also done the sprocket change on his, so I don't think the drive ratio would explain it much either. Overall, I am very happy with my results and would say it was more than well worth the investment!