2000 yz426 jd jetting can't dail it in. help!

[cheet]

Does anybody know how I can find the correct setting for my air mixture screw I can not get my carb dialed in. Any pointers or tips would be very much appreciated. Thanks

[FORMA MOTO]

Read the 'setting your pilot jet' at the top of the forum

You adjust for max idle, starting with a low idle screw idle.

 

It's a fuel screw, not an air screw

[cheet]

Well it says it is a fuel/air mixture screw I agree but I don't quite understand what you mean there. Could you be more specific?

 

[FORMA MOTO]

You adjust the fuel screw for idle: the fuel screw should raise the idle to the desired rpm (or close, then fine tuned with the idle screw).

If you keep turning it out, the idle goes back down.

 

 

Your goal is to turn the fuel scrw out from 1.0 turns, to acheive optimum idle speed, and have it land between 1 and 2 turns out.

It will take a few times to understand how to balance idle and fuel screw to achieve this.

 

If you have to go less than 1.0 turns, your pilot is too big

 

More than 2.0 turns, it's too small.