Pilot Screw Adjustments - TeryxHQ.com Forums

LenF · 06-21-2008, 06:47 PM

What function does the Pilot Screw do in the teryx carbs?

Is it a Idle mixture adjustment or a part throttle adjustment or what?

mouser58 · 06-21-2008, 06:52 PM

I no expert in carbs, but I think that there is a Pilot Jet and Idle Mixture screw. Pilot Jet is one needle sets in.

LenF · 06-21-2008, 07:02 PM

I could not find a idle mixture adjustment in the teryx service manual. The manual shows a pilot screw adjustment but does not say what it is for or what it does.

NEVERENOUGH · 06-21-2008, 07:21 PM

The pilot jet (not sure on the screw) Is for idle fuel delivery I believe but I am not expert. I know when jetting I usually don't mess with a pilot jet. I bet Todd from Hunterworks will chime in he seems to be the expert on carbs and such.

Hunterworks · 06-21-2008, 07:48 PM

No expert on carbs just spent a lot time screwing up.

The pilot screw adjustment can be one of two things. I believe when they call it a pilot screw it adjust fuel for idle.

You accomplish the same thing with a air mixture screw but you do it with air instead of fuel and it is still for idle only.

Some carbs use a pilot adjust for idle and some use a air adjustment.

The "pilot" screw is on the bottom of the carb with a brass plug over it. Go over to my website and watch the install video for the Teryx carb kit to see how to remove it and then adjust it.

Why do you think you need to adjust it?

Todd
Hunterworks

LenF · 06-21-2008, 08:04 PM

Todd,
I've been following your posts on your carb kits and after installing the dynatec CDI I noticed the same rough idle and miss at idle when cold or warming up at a slow idle. Just wondered if a slight ajustment might cure this problem.

I realize the carb kit you sell may take of this problem and gain more power. Thanks for your replies.

NEVERENOUGH · 06-21-2008, 08:58 PM

Somehow I knew Todd would be able to help. He is full of the most helpful info and always willing to share. Thanks Todd you are the man.

Hunterworks · 06-22-2008, 07:32 AM

Lenf,

If your only problem is idle then a adjustment may do it. My opinion is jaded but the kit will do it and it will definitely help your performance.

Neverenough, thanks!!

Todd

bduncan1231 · 06-28-2008, 07:18 PM

Go to Nyroc's ATV info website. In the tech articles for kawasakis, there is an article on the proper way to set the pilot screws. Those boys know there stuff! That site has kept my 02 prairie in great shape all these years and saved me quite a bit of money. All kawi v-twins respond pretty much the same. The carbs have changed over the years but are still basically the same

Magellan · 06-29-2008, 07:38 AM

Here is a pretty good carb tuning article at the HighLifter Forum.
Basic CV Carburetor Tuning Guide

I have seen the Nyroc one but can't seem to find it again right now. I also like the Nyroc site.

06-21-2008, 06:47 PM	#1 (permalink)
LenF Junior Member Join Date: May 2008 Location: Medford, OR Posts: 8	Pilot Screw Adjustments What function does the Pilot Screw do in the teryx carbs? Is it a Idle mixture adjustment or a part throttle adjustment or what?

06-21-2008, 07:21 PM	#4 (permalink)
NEVERENOUGH Senior Member Join Date: Mar 2008 Location: Chino Valley Az Posts: 586	The pilot jet (not sure on the screw) Is for idle fuel delivery I believe but I am not expert. I know when jetting I usually don't mess with a pilot jet. I bet Todd from Hunterworks will chime in he seems to be the expert on carbs and such. __________________ Too much is neverenough 2003 duramax dually for towing 2004 Gearvbox toyhauler 2006 limited yfz 450 mine 2003 Pred 500 wifes 1986 4trax 250R sons 1997 300ex daughter 2006 250ex daughter 2008 Teryx ours

06-21-2008, 07:48 PM	#5 (permalink)
Hunterworks TeryxHQ.com Site Sponsor Join Date: May 2008 Posts: 519	No expert on carbs just spent a lot time screwing up. The pilot screw adjustment can be one of two things. I believe when they call it a pilot screw it adjust fuel for idle. You accomplish the same thing with a air mixture screw but you do it with air instead of fuel and it is still for idle only. Some carbs use a pilot adjust for idle and some use a air adjustment. The "pilot" screw is on the bottom of the carb with a brass plug over it. Go over to my website and watch the install video for the Teryx carb kit to see how to remove it and then adjust it. Why do you think you need to adjust it? Todd Hunterworks __________________ www.hunterworks.com www.3stepatvtires.com

06-21-2008, 08:58 PM	#7 (permalink)
NEVERENOUGH Senior Member Join Date: Mar 2008 Location: Chino Valley Az Posts: 586	Somehow I knew Todd would be able to help. He is full of the most helpful info and always willing to share. Thanks Todd you are the man. __________________ Too much is neverenough 2003 duramax dually for towing 2004 Gearvbox toyhauler 2006 limited yfz 450 mine 2003 Pred 500 wifes 1986 4trax 250R sons 1997 300ex daughter 2006 250ex daughter 2008 Teryx ours

06-22-2008, 07:32 AM	#8 (permalink)
Hunterworks TeryxHQ.com Site Sponsor Join Date: May 2008 Posts: 519	Lenf, If your only problem is idle then a adjustment may do it. My opinion is jaded but the kit will do it and it will definitely help your performance. Neverenough, thanks!! Todd __________________ www.hunterworks.com www.3stepatvtires.com

06-21-2008, 06:52 PM	#2 (permalink)
mouser58 Senior Member Join Date: Mar 2008 Location: New Martinsville, W.Va. Posts: 143	I no expert in carbs, but I think that there is a Pilot Jet and Idle Mixture screw. Pilot Jet is one needle sets in.

06-21-2008, 07:02 PM	#3 (permalink)
LenF Junior Member Join Date: May 2008 Location: Medford, OR Posts: 8	I could not find a idle mixture adjustment in the teryx service manual. The manual shows a pilot screw adjustment but does not say what it is for or what it does.

06-21-2008, 08:04 PM	#6 (permalink)
LenF Junior Member Join Date: May 2008 Location: Medford, OR Posts: 8	Todd, I've been following your posts on your carb kits and after installing the dynatec CDI I noticed the same rough idle and miss at idle when cold or warming up at a slow idle. Just wondered if a slight ajustment might cure this problem. I realize the carb kit you sell may take of this problem and gain more power. Thanks for your replies.

06-28-2008, 07:18 PM	#9 (permalink)
bduncan1231 Junior Member Join Date: Apr 2008 Location: Mt. Juliet, TN Posts: 17	pilot screw adjustment Go to Nyroc's ATV info website. In the tech articles for kawasakis, there is an article on the proper way to set the pilot screws. Those boys know there stuff! That site has kept my 02 prairie in great shape all these years and saved me quite a bit of money. All kawi v-twins respond pretty much the same. The carbs have changed over the years but are still basically the same __________________ 03 DEodge 2500 diesel 550+hp, 1000+lbft 08 Teryx wifes 01 Raptor 720 mine 02 Prairie mine too but daughter thinks its hers 00 Polaris Magnum 325 daughters 87 Tecate restoration in progress 89 Sea Ray 390 Express Cruiser my summer home without kids

06-29-2008, 07:38 AM	#10 (permalink)
Magellan Senior Member Join Date: Jun 2008 Location: Western, NC Posts: 376	Here is a pretty good carb tuning article at the HighLifter Forum. Basic CV Carburetor Tuning Guide I have seen the Nyroc one but can't seem to find it again right now. I also like the Nyroc site.

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