Bike will not idle without the choke ingaged?

Failure to idle (or even start/ run) without the choke is indicative of dirty carb(s), partially clogged slow jet. Leaving a bike to sit with un-stabilized fuel is inviting problems, ethanol is the culprit.

minha yz426f quando vou de terceira marcha devagar mas quando eu acelero a fundo ela engasga , mas ? so de terceira marcha de rewsto nao faz isso

If the carb is adjusted correctly, the engine will not idle without the choke when cold. I will usually take at least 3 to 5 miles of riding to get the engine warm enough to idle by itself without the choke. If your bike is a full operating temperature, it should idle at about 1000 RPM. If it's idling higher than this, you need to slow it down a bit.

Remove the air filter cover and look at the top right side of the carb. You'll see a screw there . This is the throttle stop screw. Turn the screw counterclockwise to lower the idle speed to 1000 RPM or so. Blip the throttle and let it settle back to idle. Reset it if necessary. Once set, put the air cleaner cover hand on.

This could be due to timing screw being incorrectly set
Locate gold timing screw on the carbrettta turn it clockwise only slightly till bike idles without choke on, Then when choke it on it should idle a touch higher.

floats out of adjustment remove the bowl check float reset if adjustable or replace

have u checked the float hight on the carburator? also make sure ur choke curcuit i clean and free of dirt

try using that redex stuff get back to me