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I have a 96 gsx600f witch was stoud for a while before. i got it, managed to get it running but wen u toutch the throttle it just dies, it idels fine thou, carbs have been cleaned, inlet manafolds are fine. Could it just be a case of adjusting the pilot screw (air/fuel screw) an if so ware to would it be. Iv had a quick look but couldnt find it. Thanks

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Start at 3 turns out from lightly seated.

Posted on Oct 12, 2013

  • Brian Oct 12, 2013

    Start at 3 turns out from lightly seated. They are on the bottom of the carburator where they go into the intake manifold. They may still have the brass plugs over them so you will have to drill out the plugs to get to the screws.
    Best to remove the carburators and clean out the pilot jets while you have them apart.

  • Brian Oct 12, 2013

    Start at 3 turns out from lightly seated. They are on the bottom of the carburator where they go into the intake manifold. They may still have the brass plugs over them so you will have to drill out the plugs to get to the screws.
    Best to remove the carburators and clean out the pilot jets while you have them apart.



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Posted on Jan 02, 2017

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SOURCE: Tuning problems with 1985 Honda CR125

Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. Any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

Please rate this solution. Thanks!

Posted on Mar 29, 2009

  • 1 Answer

SOURCE: looking for the air fuel mixture screws on carb any help?


Posted on Apr 09, 2009

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SOURCE: Cleaning Carb Jets

not to a trained ear also go by rpm and spark plug color

NOTE: use copper wire to clean jets, sync is just thottles are same position as all carb's just leave them adjustments alone will be fine if are out use a 1/8 drill an place in between piston/butterfly to carb bore to sync/calibrate

better use a manometer for adjusting screws

depends on condition of org parts

worn = richer running

new = lean an clean

also if changed the exhaust system need to
re-calibrate carbs for max performance

Posted on May 09, 2009

  • 3567 Answers

SOURCE: Hyosun Scooter Carb Adjustments

Very good thought process on the adjustments. The throttle screw sets the idle speed and the air screw sets the fuel mix at idle speed. The stock setting is 1.5 turns outward. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward.

From this point you adjust the idle speed then adjust the air screw for fastest idle speed at that throttle screw setting. If the idle speed becomes faster than desired after adjustment, just reset the throttle screw and then reset the air screw.

A “very helpful” rating for this answer? Thanks!

Posted on Jun 27, 2009

  • 3567 Answers

SOURCE: How do I adjust a Mikuni roundslide carb. Thanks

Turn the air screw and the throttle screw inward until they LIGHTLY seat. Now turn each of them outward one and one half turns. This is the factory setting. You might want to clean the carbs. After cleaning, before you put the slide back into the carb, move the clip on the jet needle downward one notch. This will richen the fuel mix and help with the bog.

Posted on Dec 11, 2009

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