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My friend has a 2001 660. We are installing a full exhaust and a k&n air filter, and gonna be running it without the lid. What jetting should we be putting in, i'm guessing 155/160 or 160/165? And i'm thinking 4th clip position down on the needle? And I also will be installing 25 pilots. Also how many turns out on the fuel screw. Not too sure on the altitude here but we are in Killeen, TX 76543.