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please help

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please dont bash on me cause im new to four stroke i just bought a new yzf 250 last week and i pops when i let go of the gas ever once and a while so i was told to turn the air fuel screw, but i can find the screw and i dont know which way to turn it, please help me with out the bashing thanks

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Its running lean. The screw is on the carb somewhere. Sorry I don't know directly where but someone els that has the bike will be able to be more specific.

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It's on the bottom of the carb. There's a hole and you use a little screwdriver to get to the fuel screw.. Turning it out makes the bike richer.

I have an extended fuel screw and it works good.

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Bro...

No worries,,, everone here was a noob at some point,,, joshb is correct, the screw is on the bottom of the carb, in a recessed part of the float bowel. Sounds like yer a little rich, turn it clock - wise to lean it out.

Be carefull... Be Paitent,, do 1/4 a turn, try it out. If no cahnge do another turn,,, and so on.

Also, make sure the motor is warm.

Good luck

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Look at the sticky in the jetting forum. Set your pilot & fuel screw accordingly. Problem will be fixed.

Enjoy the new bike.

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If it 'pops' on decel, then you are lean...............not rich. Turn the screw out 1/2 turn at a time. If the 'pop' is severe, turn a full turn and see the effect that adjustment had. If you turn out more than 2 1/2 - 3 turns, go up in your pilot jet. :thumbsup:

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A little popping on decel is a sign of a well-jetted pilot circuit. If it pops too much, you're lean.

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