Question about 1983 Suzuki GSX 1100 E

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1980 1100, I need mixture screw settings, have set at 2 turns out but am at about 2000ft above sea level so maybe has to be altered slightly? In or out?

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First - I do not know this bike specifically, but with 4-strokes the screw usually adjusts the fuel, not the air in the pilot circuit. Keep in mind this screw only adjusts the mixture from idle up to just under half throttle. It won't effect higher engine speed performance.

Basically, you can adjust them in 1/2 turn increments until you get the desired performance. Or, fire it up, and adjust the screws with it idling until you can get the highest, smooth idle - this is likely where it will be best.

Now - if the screws are 'behind' the carb slide (air filter side) they are an air screw. If they are on the engine side of the slide, they are fuel screws - the two work opposite of eachother. They're likely on the engine side of the slide, so screwing them in will lean out the pilot circuit (less fuel). So - if after you adjust the screws as described above, check to see how far out from seat they are. If you are not around 1.5-2.5 turns out, you might consider changing the pilot jets inside the carb.

Posted on Nov 12, 2009

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