Took out my new bike today for the first time. It was a bear to start and once started it poped and backfired like crazy. It was also cutting out a bike out with a quick chop of the throttle and basically ran really lean. It came stock with a 168mj. Before I ever even started the bike I put the JD Kit in. I also put in the zip ty screw and the Twin Air screenless filter kit. THe JD Kit calls for the Red needle in the 5th position from top. It also called for a 178mj at my elevation 0-3000 ft. Temp today was around 70-80. I put in a 180mj when I got home and it helped some with the backfiring. I also tightened my Zip Ty Screw to try and help the cut out when I chop the throttle. There were too other guys at the track with stock jetting who had no complaints on their new 05. Anyone have any ideas what I should try? Would lowering the clip on the needle richen it more than a bigger mj? Its kind of like I am rich in the pilot and lean in the main??? Not sure where I am at with the needle. Thanks guys! Help JD!