NEDW needle

[GMP]

So you were rich and mistaken for being lean then. Now get and try an NECJ in pos #3.

[david.bergen]

So you were rich and mistaken for being lean then. Now get and try an NECJ in pos #3.

I am getting totally lost in all these needles
So I'll just follow the suggestions. I'll order a NECJ but that can take some time ( up to 2 weeks).

Why was the NEDW #2 crisp at small throatlle and NEDJ #3 not ?
I thought NEDJ was a leaner needle then NEDW

[Hammer]

I would have told you to put the NECJ in but you didn't list it. I do a crap load of 2 stroke tuning and have yet to see a 250 or 300 with a 36mm carb that needs a W needle for the summer time. 250 MX bike with a 38mm sure.

[nevermind]

I would have told you to put the NECJ in but you didn't list it. I do a crap load of 2 stroke tuning and have yet to see a 250 or 300 with a 36mm carb that needs a W needle for the summer time. 250 MX bike with a 38mm sure.

I ride at sea level in very humid conditions. I tried so many different combinations of needles, clip positions and PJs that I could R&R the carb in less than 8 seconds. I had to go leaner than the NECJ to get rid of the sputtering off idle and up to 1/8th turn. I was watching some drag racing on the idiot box and heard them talking about adjusting their fueling for local humidity levels. I found an internet tool and calculated my Density Altitude to be over 3000'. Once I started jetting for that altitude I had more success with getting my motor to run smoothly.

[betaboy]

https://www.youtube.com/watch?v=uDMdgX-nosc

This is the same jetting I ran in my rr300 2015, but using a 170 main.
I also used the 2007 ktm 250 cdi box.
Also closed the squish to 1.1mm.
As you live in Belgium I would try the oil this bike
is running on Denicol syntec racing at 40.1.
So clean with no smoking.

[david.bergen]

https://www.youtube.com/watch?v=uDMdgX-nosc

This is the same jetting I ran in my rr300 2015, but using a 170 main.
I also used the 2007 ktm 250 cdi box.
Also closed the squish to 1.1mm.
As you live in Belgium I would try the oil this bike
is running on Denicol syntec racing at 40.1.
So clean with no smoking.

What jetting is used here ? main 170 but what needle, clip and pilot jet .
Thanks for the info on the oil
Denicol racing 2 syntex is that the correct oil ?

[betaboy]

Yes
Denicol racing 2 syntec at 40.1 raito
40 pilot
NECJ#3
170 main
Hope this helps.

[Clearvu1]

I would have told you to put the NECJ in but you didn't list it. I do a crap load of 2 stroke tuning and have yet to see a 250 or 300 with a 36mm carb that needs a W needle for the summer time. 250 MX bike with a 38mm sure.

I ride at sea level in very humid conditions. I tried so many different combinations of needles, clip positions and PJs that I could R&R the carb in less than 8 seconds. I had to go leaner than the NECJ to get rid of the sputtering off idle and up to 1/8th turn. I was watching some drag racing on the idiot box and heard them talking about adjusting their fueling for local humidity levels. I found an internet tool and calculated my Density Altitude to be over 3000'. Once I started jetting for that altitude I had more success with getting my motor to run smoothly.

That's very interesting information. It really throws off the factory jetting charts though. I just ran my Density Altitude and instead of jetting for 850' ASL I need to be closer to 2,200" ASL.

[david.bergen]

I also tried a tool but I am in the correct range.
I'll check it again when winter is here

[david.bergen]

New update,
As the new ordered needle hasn't arrived and I had some spare time I tried the original needle again
Second position pilot 38 and 168 main . Bike ran good but was really rich and smoked a lot even when warm.
Next I tried the same setting with the 165 main. Ran even better but I got again the hesistation when whacked open the throattle at low rpm.
Next I changed the pilot to 35 and the main to 168 again. Bike ran really good and strong n the mid and top range but is was 4 stroking at 1/8 opening. Next I tried is main 168 and pilot 38 with the needle clip in #1 position.
Bike ran really good far less smoke and really good responce on the 1/8-1/2 throatlle position.
Only when whacking the gas open in 3-4 th gear with low rpm I get a stutter. Bit more rpm an no issues.
I also checked the plug and it was black with a small hint off dark brown
I hope to receive the new needle soon