Could some one please educate me on how the auto tune feature works? As I read some of the web sales sites they seem to tune the bike automatically. One of the threads on this site definitely does not read that way. Another option, buy the PC and get a dyno tune from someone who is knowledgeable. Three hundred dollars for the PC and another $150 to $200 for the dyno tune is awful close to the price of the PC and the autotune. Which is better? thanks very much for your thought. As a newbie to the 109 I enjoy reading this site. Merry Christmas and a Happy New Year to all!!!!!