Harpoon
Expert Class
Hired Gun
Posts: 151
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posted October 19, 2001 06:01 PM
Air mixture screw adjustment
Has anybody done any adjustments to their air mixture screws on the throttle bodies? I think I remember someone posting something about that a while back. Any info on this subject would be appreciated.
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Big_Zx12r
Expert Class
Posts: 180
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posted October 19, 2001 09:59 PM
Harpoon, I wish I could help but I don't remember seeing that. I guess the least I can do is bring it to the top for ya! Awe...don't mention it! 
-Big Zx12r
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Harpoon
Expert Class
Hired Gun
Posts: 151
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posted October 20, 2001 05:38 AM
Thanks for the boost BIGZX12R. I've been trying to get the idle and low speed running sorted out. I've got a Muzzy pipe and PCIIIr. It runs strong everywhere else. I think it was Doug Meyers who did a post on those idle mixture screws. I'm not sure. Hopefully I'll have some time today to fool with it some more.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted October 20, 2001 12:49 PM
Bypass screws
Set them at 2.5 turns.
Doug
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Zx23rr
Expert Class
Mahogany Bomber Pilot
Posts: 242
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posted October 20, 2001 03:13 PM
2.5 turns!!
Doug, what are the screws set at from the factory. Same all across or different from each other???
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted October 20, 2001 05:30 PM
All over the map.
I've checked 4 throttle body sets and the screws are all over the place, some even closed completely. Someone I trust on the factory level says this shouldn't be and it would be good to at least start with them all the same before fiddling around. My bike works well with them at 2.5.
Doug
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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Harpoon
Expert Class
Hired Gun
Posts: 151
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posted October 21, 2001 07:43 AM
Air mixture screws
I spent a couple of hours adjusting these screws and found that it makes little or no difference in the way the bike idles. Doug, You mentioned that the screws were not set the same from the factory. could it be when drilling out the plugs , the drill bit hitting the screw itself and turning it in? I found there were two screws turned all the way in, one set at 3/4 turns out and one 1 turn out. I ended setting them all 1 turn out. Could not tell the difference in the idle setting them between 2 1/2 turns and 1 turn.
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dougmeyer
Needs a job
moderated
Posts: 2713
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posted October 21, 2001 08:51 AM
I thought that at first, but on subsequent sets I made sure that it was not the case. Nobody said this adjustment would necessarily do anything. It's interrelated with the throttle blade setting. It may be a factor on your bike, maybe not.
Doug
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It's not that I think you're dumb, it's just that so much of what you know isn't true....
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