Its a 1993, i just went through the carbs, readjusted the fuel air mixture screw to stock possition (1'1/2 turns). I have cleaned the carbs top to bottom but now it is building up soit around the throttle flap.
SOURCE: looking for the air fuel mixture screws on carb any help?
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SOURCE: Kawasaki gt550 won't start from cold! even with choke!!
when you get the bike started you need to adjust the pilot air screw. here's how= turn in clock wise until engine falters(mark that spot with a pin)then out counterclock wise until the engine falters(mark that spot also) then put the screw in half amount adjustment of the two marks.that will take care of if it is to lean or to rich.make sure the engine is good and warm before doing so.
SOURCE: My FZR600 won't start. No mods, all stock. I got
it is possible that th eplugs might be fouled but it seems unlikely after only two weeks running-my fzr would foul plugs but it usually takes months not weeks-also the engine would start but run on2 or 3 cyls. I found using one heat range hotter than standard plugs helped,esp. around town you seem to have been fairly methodical on your troubleshooting-if you have fuel and spark the next thing to check is comp. -if the plugs are wet it is likely fuel not oil-when I first bought mine it had sat over winter and would not start -it turned out that the valve clearances had closed up enough that it was low on comp. when ridden frequently it was ok but as soon as the oil had drained off the cyl walls it would not start-squirting oil in the cyls. would get it started but I pulled the cams and set valves to solve problem-starts ok now but I don't use the choke-you could lift the cover and check your valve clearances -it would be a good idea on a bike that you just bought-don't give up -be methodical and check one thing at a time-when you get it going it will be worht it
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.
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SOURCE: 2005 kx250f wont idle.will idle fine w/choke
the fact that it idles with the choke on indicates that fuel mixture is the problem here remove the mixture screw completely check that the o ring seal is not damaged & that the end of the needle is not worn or bent if either of these conditions are obviouse replace the damaged or worn parts general rule of thumb with mixture adjustment is 1&1/2 to 2 turns out give it a try
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