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General Category >> Rubber Side Down! >> The infamous Air Mix Screw Adjustment
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Message started by stewmills on 09/27/12 at 17:19:48

Title: The infamous Air Mix Screw Adjustment
Post by stewmills on 09/27/12 at 17:19:48

Is it reasonably normal for the air mix screw's best running to be about 3/4 turn out? I read all of the reviews and most are worried about going out too far. I started at about 1 1/2 turns out per the stage 1 kit instructions but never noticed the "increase" in RMPs as I went out further.

So, today I finally did what you smart folks repeatedly say to do and screwed it all the way in. I then worked my way out and I start losing RPM right at a full turn so I went back in 1/4 and that seems to be my sweet spot.

My bike is stock with the DynoJet stage 1 kit and 1/3 off the white spacer. That's all.

Title: Re: The infamous Air Mix Screw Adjustment
Post by Serowbot on 09/27/12 at 18:43:00

Anyplace that you get the best idle,... as long as it's less than 3 turns out...
;)...

Title: Re: The infamous Air Mix Screw Adjustment
Post by stewmills on 09/27/12 at 19:34:35

4A5C4B564E5B564D390 wrote:

Anyplace that you get the best idle,... as long as it's less than 3 turns out...
;)...

And that probably explains the plug question I posted the other day....it was apparently running too rich causing the black deposits on the plug (so I was told) and maybe this adjustment leaned it up a little?

Hmmmmm....I may be learning something here :D

Title: Re: The infamous Air Mix Screw Adjustment
Post by justin_o_guy2 on 09/27/12 at 20:06:57

Man,, you are. YOure picking up little dots. YOull pick up dots & pick up dots & one day, youll see how they connect. I "Get it" better now that I have.
Ive read Serows carb stuff, I just cant remember it. Its like that "Over the head" light bulb comes on & I grasp the way the different circuits play together,,,then, it goes dim,, crap..

Im thinking I jetted it kinda rich,, Im gonna run it, take notes & come in here & read & then, Ill ask..