My bike has good 106 jets but it likes the needles in the lowest position (clip on top groove). Idle screws are three quarter turn out. Any more out and it will backfire on decel. Plugs are still a little rich. A little hunting in lower throttle openings. Idles OK above 1000RPM. I am going to try dropping down a size to 105 so I can run the needle in the middle position. I think I will pick up some low RPM torque and better low RPM throttle response. Anyone else finding they need to run 105 needle jets with our 10% ethanol gasoline?