A/f mixture 2007 400ex

[GAZ-V-21]

Do i need a special tool to set a/f mixture on an 07 400 ex? And what should i set it at for 152 main jet and 42 pilot?

[Drfat400ex]

If you take a pen cap, heat the end with a lighter then jam it up there and hold it untill it cools you can use that as a driver. As for me I have a 42 pilot and I just left it at 2.25, most people run 2.5, don't go past 2.75 though or it might fall out.

[GAZ-V-21]

I will have the carb off the bike tomorrow that should make it easier

[TheAwesomehonda]

It is a D shaped end on it so you need to eather 1. make something like other said 2. buy the motion pro tool 3. buy a ez adjust a/f and replace it with that which can be adjusted with no tools.

[GAZ-V-21]

Alright now that ive jetted the carb 152 main 42 pilot how many turns out should i start with on a/f mix? Also do you know what its set at stock?

[CJM]

About 2.5 turns.

[300exBorg]

where is this screw on a 03? anyone have a picture of it and do you have to take off the plastics to get to it?

[Stickman400]

You need a tool to adjust it while it's on the quad, unless you can jerry rig up some kind of tool. Easiest way to do it is loosen up the band clamps and tilt the carb. sideways and adjust it, then turn it back to normal and tighten the clamps back up.

[Drfat400ex]

If you can get at it with something, take it right out, then take a dremel, hacksaw, whatever you got, and cut a slot through it. Then you can use a Standard (Slot) screwdriver to turn it, and just use a 90 degree one and it would be easy as pie.

[300exBorg]

Which way is richer? I would imagine it would be turning the screw out correct?

[CJM]

Originally posted by 300exBorg
Which way is richer? I would imagine it would be turning the screw out correct?

Yes.

Out=rich, in= lean.