STIC Metering block Jetting

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9/8/2018 10:55 AM
Edited Date/Time: 11/18/2018 12:49 AM

Hi all, i have CR125 2007 with big bore kit (144cc)
I had PWK 36 short body type on it and i decided to purchase the STIC metering block
My initial jetting (with the pwk blok) was; 165 main, NOZH 2nd clip, 48 pilot
The bike ran great on sea level with lots off low end crisp power
i have just installed the STIC metering block it is .114 tube with 180main, NOZH 2nd clip and 48 pilot.
The bike pulls hard and very good from mid to top but it’s running way too rich down low
Now, i can start try to jet it leaner and try to dile it in but i am afraid to ruin my motor
Right now i am preparing my bike for enduro with lots of slow tight technical terrain so i want to solve it quick or I will have to go back to the stock carb and loose the mild to top hit that the STIC gives
Any one with experience in it?
Any one have George Bosewell email adress?
Thanks

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9/8/2018 1:18 PM

715-479-7822 or stic@frontier.com

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vomiting equals disqualification.

9/8/2018 1:19 PM

How many turns out on the air screw?

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vomiting equals disqualification.

9/8/2018 1:37 PM

Thanks for the reply, just sent him an email.
I am not sure about the air screw, i simply adjusted the it untill the bike was idling well

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9/8/2018 1:46 PM

Air screw should be around 3 or so from fully closed, maybe even 3.5

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vomiting equals disqualification.

9/8/2018 1:51 PM

BR8ES wrote:

Air screw should be around 3 or so from fully closed, maybe even 3.5

Got you,, i didn’t touched my air screw at all
Just installed the stic and started riding
Even cold start is pain in the ass...
I hope that this is the problem

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9/8/2018 2:19 PM

BR8ES wrote:

Air screw should be around 3 or so from fully closed, maybe even 3.5

Yotam wrote:

Got you,, i didn’t touched my air screw at all
Just installed the stic and started riding
Even cold start is pain in the ass...
I hope that this is the problem

Give it a shot, bet it will be the ticket as the rest of it sounds good.

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vomiting equals disqualification.

9/8/2018 7:36 PM

I'd suggest ordering a NECJ needle. They make such a clean strong power curve. I run one in my ktm 200 xc and it's fantastic.

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10' 200 XC-w
96' XR600r

9/8/2018 9:10 PM

N3EJ Yamaha needle is the go to needle, can't think of anybody running a NECJ needle with the STIC.

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vomiting equals disqualification.

9/9/2018 7:13 PM

With the STIC, George recommends running a much larger pilot jet than without the STIC. Are you sure that it is not running lean down low?

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2021 Husqvarna FC-450 RE
2019 KTM 250 SX
2015 KTM 150 SX
2015 KTM 200 XC-W

9/9/2018 8:58 PM

A few have been running a 48... if it runs good then the AS tweak hopefully does it.

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vomiting equals disqualification.

9/10/2018 11:38 AM

You need a needle with a thicker straight section diameter, and your air screw needs to be between 3 and 4 turns out.

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9/10/2018 1:53 PM

N3EJ Yamaha needle works really well .

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vomiting equals disqualification.

9/10/2018 3:44 PM

BR8ES wrote:

N3EJ Yamaha needle works really well .

I'm running an NECW in my 2003 cr250 with the STIC. Works well. Considering trying the N3EJ or N3EW.

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9/10/2018 4:00 PM

I can second this. I’ve been using the N3EJ needle in my 300 and it has worked the best out of the myriad needles I have tried.

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9/11/2018 12:00 AM

Seems like opening the air screw to 3.5 turns did very good job, the bike stopped “chocking” on low rpm but it is still feels like it’s little too rich, i will have to wait for the right needle I guess N3EJ is the first one to try

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9/11/2018 5:14 AM

Try a 52 pilot

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vomiting equals disqualification.

9/11/2018 5:17 AM

Running a N3EJ, 52 pilot, A/S ~3.5, 198 main on my 2014 KTM 150SX. Runs pretty good. I am rich at the moment but will lean out next outing.

Tried the NECJ and didn't run as well with it.

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9/11/2018 5:59 AM

BR8ES wrote:

Try a 52 pilot

52 pilot will not be richer than what i have now?

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9/11/2018 6:01 AM

erik_94COBRA wrote:

Running a N3EJ, 52 pilot, A/S ~3.5, 198 main on my 2014 KTM 150SX. Runs pretty good. I am rich at the moment but will lean out next outing.

Tried the NECJ and didn't run as well with it.

Are you running 38mm carb?
Because the jetting supposed to be different between the 2 (i have 36)

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9/11/2018 6:12 AM

erik_94COBRA wrote:

Running a N3EJ, 52 pilot, A/S ~3.5, 198 main on my 2014 KTM 150SX. Runs pretty good. I am rich at the moment but will lean out next outing.

Tried the NECJ and didn't run as well with it.

Yotam wrote:

Are you running 38mm carb?
Because the jetting supposed to be different between the 2 (i have 36)

Yes I am running the 38mm.

Do you have any other needles?

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9/11/2018 7:02 AM
Edited Date/Time: 9/11/2018 7:09 AM

BR8ES wrote:

Try a 52 pilot

Yotam wrote:

52 pilot will not be richer than what i have now?

It is a bigger jet, but this system needs it. Try the next size up. I have a 52 for my 125. Jets differently than typical. The needle will make it run better overall. What slide?

What did George say?

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vomiting equals disqualification.

9/11/2018 7:39 AM

erik_94COBRA wrote:

Running a N3EJ, 52 pilot, A/S ~3.5, 198 main on my 2014 KTM 150SX. Runs pretty good. I am rich at the moment but will lean out next outing.

Tried the NECJ and didn't run as well with it.

Yotam wrote:

Are you running 38mm carb?
Because the jetting supposed to be different between the 2 (i have 36)

erik_94COBRA wrote:

Yes I am running the 38mm.

Do you have any other needles?

I have NOZG & NOZF, it will take time until I get the needles i need
Where i live dealers are not holding stocks like that

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9/11/2018 7:41 AM

BR8ES wrote:

Try a 52 pilot

Yotam wrote:

52 pilot will not be richer than what i have now?

BR8ES wrote:

It is a bigger jet, but this system needs it. Try the next size up. I have a 52 for my 125. Jets differently than typical. The needle will make it run better overall. What slide?

What did George say?

George didn’t reply my email yet
Waiting for him to answer
I will order the 52 pilot and try it

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9/11/2018 8:32 AM

I sent George an email too, maybe he missed yours. Asked the same questions you are, etc. He should respond.

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vomiting equals disqualification.

9/11/2018 8:35 AM

BR8ES wrote:

I sent George an email too, maybe he missed yours. Asked the same questions you are, etc. He should respond.

Thanks mate!!!
There’s a holiday here, Tomorrow our Yamaha dealer will be available and i will purchase a 52 pilot and N3EJ neddle

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9/11/2018 8:56 AM

Yotam my apology I seem to have lost your email contact; I initially responded by telling you I would get with you on Sunday U.S. was at a friend's wedding. CSAR and others are very intelligent and well versed, take their advice. I will respond as soon as I have your email. George

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9/11/2018 9:24 AM

The STIC metering block features:

Voice of Robert: “I have tested the STIC metering block; “Here is my review of the STIC metering block:” “The invention of the STIC metering block and methodology may be one of the greatest examples of a superior engineering design that controls air-fuel elemental molecular vaporization and the rate of the air-fuel-vapor flow rate into the engine based on the STIC’s ability to sense changing engine dynamics; driver, and landscape demand changes including changes in temperature and altitude.

I have carefully tested and reviewed the STIC block and STIC tube. This includes its claims and various features. I have talked with the inventor and here are some of the STIC features that I agree; they are true as claimed after my review: (1): The STIC system appears to more effectively utilize the available oxygen no matter where it is in terms of altitude and temperature. (2): The STIC auto-selects the prevailing higher pressure; choosing from atmospheric and the engines fluctuating intake, combustion, and exhaust pressures. This feature allows the carburetor to create a higher differential pressure drop [vacuum]; thus causing instant air/fuel vaporization independent of engine suction. (3): The STIC has an acceleration system that auto-loads; thus having instant acceleration from all positions including low rpms. Due to the fact that the STIC system is able to sense engine intake demand and pressures; it has the ability to have a broad jetting range and it appears to know which engine it is on thus requiring very little changes in jetting. This is confirmed by comparing CSAR’s 300 with TOKYO: Mark’s (Japan) 250 utilizing similar jetting verses Phil’s 300; they have identical jetting as CSAR’s jetting in New Mexico at 5200 feet. (4): The STIC has a power system that does not need power wings, power jets or small carburetors. The pilot jet is now part of the STIC power system that blends the pilot jet fuel and its related air circuits into the jet tube outlet; this is one of the reasons the front air screw and the larger pilot jet is part of the equation. (5): the inventor tells me the optimum should use a #6 slide; and reports most applications will want to use the 38mm carburetor as you no longer need the smaller carburetor to cause it to trigger. The inventor also reports there will be a new air screw and idle speed screw coming soon, and there will be new STIC needles on the horizon that will come with the STIC metering system.” Robert Engineering.

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9/11/2018 1:41 PM
Edited Date/Time: 9/11/2018 1:45 PM

Yotam, give George another email, he is expecting you.

stic@frontier.com

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vomiting equals disqualification.

9/11/2018 2:22 PM

BR8ES wrote:

Yotam, give George another email, he is expecting you.

stic@frontier.com

Clear, done.

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