It will start but wont idle, ive adjusted the fuel/air mixture screw and cleaned it
SOURCE: hesitation problems 2003 yamaha wr 450 f
sounds like a jetting issue. change the main jets starting from the largest one you own and work your way down.
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: i have a yamaha pw 80 that starts but stays revd
Check the screw on the side of the carb in the middle, just under the slide and screw it counter clockwise.If this has no effect I suggest you check the cable adjusters to make sure you have free play on the cable.
please leave fair comment if I have helped you
thanks
SOURCE: My 1987 yamaha 80cc big wheel will not idle. would
well first try the choke if it runs good when you pull the choke even a little then you need less air, if it runs worse then you need less air, in is less air and out is more air thats the air mixture screw.
idle screw is self explanitory start turning it if it idles up then your turning it up if it idles down then you are idling down usually in is up.
SOURCE: I have a pw 50 yamaha 2stroke that runs great at
lol Sounds like u lot ent got a clue !!! its compression!! new piston and rings by sounds maybe just two rings if ur lucky!!
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