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What Happens When You Turn The Idle Mixture Screw In And Out? [Solved]

Loosening the screw strengthens the air and fuel mixture and increases the amount of fuel flowing to the engine. Loosening the screw is also called making the fuel mixture richer, which increases the RPMs at which the engine idles.

How To Set Scooter Idle Mixture Screw

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How to Set Idle Mixture Screws

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Pilot Air/Fuel Screw Adjustment Explained - Single Carb - Part 1

http://www.howtomotorcyclerepair.com/how-to-size-your-pilot-jet-