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Only $10 for all 2026 SX, MX, and SMX series.
initially i tried it with .114 and it bogged badly no matter how hot \ rich jetting i went.
finally i replaced it with .115 and it runs perfect since then, i can say that i gained lot of torque at low RPMs that was pretty important for me (i am riding in slow, tight technical terrain) and it made my 38s run in low rpms better than the 36s PWK i had on it before: in low RPMs it was crisp like 36 and in high RPMs the bike breathed like a 38.
so i have no bad things to say about this carb...
also runs super clean.
i didnt test it in different elevation, i ride mostly on sea level so i cant tell how it deals with it.
as for fuel consumption i didnt noticed any changes, my riding partner has a EXC125 2010 and our bikes have same mile range.
i have no interest, i will probably never sell my carb and i have nothing to do with Derek Harris or Boswell, i just give this set up a thumbs up.
plus: i never tried Lectron SC or any other set up on this specific bike, only on other bikes i had.
Jetting:
190
48
3.5 turns on air screw
blue JD jet needle on third clip
i run it for about 120 hours with no issues.
I measured the floats and they were bang on 6.5mm, but I raised them slightly anyway and they run parallel with the bottom of the carb.
Bog is gone and this bike rips. The track is tight with big uphill jumps, went to 4.5 aircrew. Have a little residue at the tail pipe but no sponge.
Might try the 50 pilot
It runs somewhat leaner and more crisp off the bottom. Mid and top are amazing, holy shit this bike rips.
Current spec.
50P
2 turns out air screw
200 main
Jd stic needle #4
It carbonates really clean, maybe lost a slight bit of bottom but I am gonna go to 52p tonight the airscrew a little further out again.
Did I say the bike rips? Lol.
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The new JD stic specific needles have a narrower tip also.
That's what she said lol
And do you happen to have any dimensions on the JD needle? Curious about the straight section diameter and how the taper compares with the other offerings you've tried.
I ran a STIC in my '14 150SX and it ran great until I roasted the top end and cylinder due to a stuck gas tank vent/ ball check. Also ran great in my TC250, but made for too much of a good thing (ran out of talent too fast for it on the 250).
To my knowledge, the 113A tube has an extra hole as well as being narrower than the 114. Tokyo off road has a great YouTube explanation better than mine.
James Dean himself developed two new needles specifically for the STIC
https://ktmtalk.com/showthread.php?545649-STIC-jetting-thread&p=5425300…
My STIC experience: I have a 18 150xcw with the following mods: 36 Kehin, V4 Reeds, RK Tek Head, BR8 plug, PV=red spring 2 turns in. It runs great and I have been very happy with the bike once I got it dialed in. However, when you ride a 150 you are always interested in more power. I stumbled on the STIC mod over on TT on the 150 thread. Mog was testing it on a 150 and had very positive things to say. I did some more digging and found this thread and after a lot of back and forth decided to give it a shot. I ordered it direct from STIC with the JD jetting kit. Shipping was quick and installation was easy. I went with the suggested jetting 50pilot, 200 main JD red in the 4th clip position. That turned out to be a little lean. I ended up with a 52 pilot, 200 main JD Blue 5th (bottom) clip position AS 2 turns out. How does it run? Awesome. It has more power everywhere, but the biggest gain seems to be in the midrange. It will pull a gear higher than before in most situations and it is much easier to loft the front wheel in faster 3rd, 4th, and 5th gear situations. It's really a noticeable gain that puts a big grin on my face. My 150 carbureted very cleanly before, but this is next level clean. It feels perfect to me now. Another, unexpected benefit is that it will run down the road at a steady speed now 30-40mph like a 4 stroke! No more hunt and peck that every 2 stroke I have ever owned has done. This is gonna be so nice doing enduros when you get to a road section. I am very happy with it. It was expensive for what you get, but I'm very satisfied with the STIC and recommend it to 150 riders looking for more power. I have no connection to the STIC company or anyone who sells it and I paid full price for the kit.
My stic and jd jetting kit just turned up, ordered both from Tokyo offroad on Saturday and they were here by Wednesday, impressive stuff.
Have to stay I'm still a bit skeptical but I'm looking forward to trying it and will report back.
I fitted it with the standard throttle just the see if it would work but it was short and the throttle would stick during the first few mm of travel but be free after that.
I'm hoping that this is because I need the right throttle and cable and not that I have a dodgy carb.
Pit Row
I run 50/50 Av Gas & non-ethanol premium in all our 2-strokes(which all have STICS). I mainly run this for consistency reasons but the engines are all tuned for it also. I have/could run just the premium if I chose with no detriment.....
STIC and other carburetor manufacturers are all about perfection for their customers, we try extremely hard to please you. I think most everyone is pleased with how the STIC system performs, it is obvious in the attached videos and the live comments by these professionals. However, what makes products better, is when perceptive riders find a particular minor issue representing a throttle position of 2% to 8% off idle, and STIC is all about delivering the best product possible, so my hat is off to those that seek the best possible performance under all conditions even by perceptive individuals it makes us better. Bear in mind the STIC is designed to have an aggressive acceleration system, this was accomplished by merging the idle intermediate (pilot jet and related passages) aka circuitry, with the main jet system and other features. One of the other key features, the STIC has an “auto selection” feature that automatically selects various higher pressures from multiple sources. The problem is, the auto selection feature is hair triggered to auto select in the first movement of the throttle, right in the 2% to 8% window. Some people have tried different slides, changed the oil to fuel ratio from 60:1 down to 32:1, in fact this does cure a majority of the problems, and so does the leaner #7 and #8 slide, reducing the issue to a unimportant occurrence.
Due to the overall improved performance of the STIC metering system on engines ranging from the 125cc to 500cc, I am hesitant to change the idle intermediate opening sizes, as it will affect the overall performance of the STIC. Even though I am trying, I will probably not make everyone happy as there are too many variables including those that are trying to address a slight condition at 2% to 8% throttle opening. For those that are riding MX, trail, or other venues; they will probably not notice any problems just off idle. That being said STIC will work with testers on a continuous basis to make the STIC all it can be to everyone. The STIC is in its original patented design, that has not changed as it is a current proven invention. Happy trails.
TOKYO KTM 250.
https://www.youtube.com/watch?v=DcRvH5VjD-I&t=1s
Dirt N Iron. (out of the box, no adjustments)
https://www.youtube.com/watch?v=V-0b57Lxyck&t=620s
KTM 300 New STIC carburetor out of the box, no adjustments.
https://www.youtube.com/watch?v=wNkzUroFtVc&t=22s
When I went to the 113a tube, I ran into some bogging issues and figured it was from the 7 slide that comes on the oem stock carb.
My current setup is aftermarket keihin 38mm shorty airstryker
205 main
52 pilot
Red JD stic needle, its either 2nd or 4th clip can't remember
6.5 slide
3.5 aircrew
Don't know about float level, George setup
114a tube.
I am hearing that there are different blocks as well. Not sure I want to know lol.
Bike runs amazing on straight VP T2 or 50,50 pump leaded 40.1
For thr settings on the gas gas 125 stic, look up MOG on TT... he is running mikuni needles
I'm a woods racer. Scrambles and timekeeping enduro. I recently got a 2014 (old motor) 150SX just for fun and I'm having a blast with it. My personal track on my land, although it's a pretty long 8 mile loops, is ledgy and tight.
I was considering finding a PWK36 to replace the 38. Would you all recommend just getting a STIC for my 38?
The regular STIC has been recently upgraded the STIC. The New STIC Super "X" increases the overall performance of the regular STIC by a substantial amount. This new "X" system has several new passages that cause the STIC to be pressurized by the engine's airspeed which ranges from zero to +300 mph. The engine air speed enters the top of the tube to increase the differential pressure drop to over 100 psi. This airspeed also enters the bottom of the STIC tube to pressurize the central tube to over 200 psi. This increases the intensity of the already great regular STIC by a factor of X10. We suggest you try it; you will love it.
Post a reply to: 38mm Airstriker and STIC, KTM-150sx.