I just got done installing a DAJ on a 2006 V2. I previously re-jetted with the Dynojet kit and the muffler and air filter are stock. The main jet on the Dynojet below 3000 feet is 118. With the DAJ on the middle stock position, I went down to a 114 and it ran way too rich. Then I went down to a 110 main jet leaving the DAJ in the middle position and she ran perfect, leaving me full adjustabilty. I offer this trial and error to anyone installing with similar conditions as mine. A pain to install for sure, but a good upgrade over the long run.