I've got my Ninja 250's idle mixture screws set to 2.5 turns out helping with the idle lean settings, but I noticed when I cleaned my original carbs the previous mech.'s had put in a washer on each needle. I removed it and found the reason they had put them in, as I then had a midrange hesitation, re-installed the washer on each needle, problem fixed.
Tony
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1997 Yamaha Seca II - mostly stock, Racetech upgraded forks, FZ6R rear shock, Oxford Heated Grips, Barkbusters Blizzard Handguards, a Scottoiler vSystem chain oiler. My Mileage Tracker Page.
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