I have them in my three wheeler. It is so much fun to drive with more power. Rear tire consumption will go up a bit aswell. I have an unlocked ECU. You can download the Portune2 software for free from S&S. It isnt very difficult to figure out. It has a learning feature that will make changes to the fuel and timing maps. After you drive it for a while you can use the protune software to merge this correction maps with the tune so that it is saved and wont delete if you loose battery power. My next add on is to replace the Centa bushings again and then bolt on the 58mm throtle body that just arrived from Vital V Twin. Word of caution. When choosing cams, the 569 cams are non-interfearence. This means that WHEN! your cam belt breaks. you probably wont need to replace the motor. The 618 cams are interfearance cams. WHEN! your cam belt breaks you will hit the valves with the pistons. This will probably signal the end of that motor in its entirity. Choose wisely. Dont forget to open up your exhaust and let it breathe. I did the magnaflow exhaust build you can find with a search of this forum. It is Loud! which I like. Safety Fast
