Jakobi
Super Moderator
or KTM part number: 54731034000 (alternate for most years 250/300EXC)
I found our local Yamaha dealer wanted twice as much for the same piece. Shop around. In the states they go as cheap as $10.
2015 250 jetting NEDW
- Thread starter MOGaser
- Start date
or KTM part number: 54731034000 (alternate for most years 250/300EXC)
I found our local Yamaha dealer wanted twice as much for the same piece. Shop around. In the states they go as cheap as $10.
adriano.ro
New member
I've been trying to jetting my ec 250 FR 2014. So far I have used different needles N1EF ,N2ZJ and now N3CW. My plan is to take maximum torque from carb. N1EF is rubbish, next is N2ZJ was good with 42 #3 and 175,but not very special on bottom end. N3CW pulls good from bottom,but only with 45 pilot and 178 main, if I go down on pilot ,quick acceleration will result in BOO AAAA! In teory witch needle will give max torqe and witch one will give best consumption?
I had the same question with my 250R (ASII). Currently it has 182 main, 42 pilot, N3CJ on third clip and 7. slide (stock). It feels a bit rich around idle and very low RPM's when it's hot (over 25C) and I'm riding slow difficult track, so I have to turn out the air screw more. The dealer told me that if anything, he would go to slide no6. I'm quite happy with it, it has good torque and it's quite economic too, about 150km of easy riding before having to turn to reserve or 120km harder trails.
stabak
New member
Try the suzuki needles... NECW or smg... smaller jets, best linear torque but no boom and top revs... might be best for consumption too...
you're kiddin right? sounds like a keeper.... 150km
Jakobi
Super Moderator
150km out of a tank seems a bit of a stretch eh 
In saying that, I routinely get over 100kms out of my 9.5L. Have a mate with a 15 250R, running the same jetting over the same loops, at the same pace. A few times now he's chewed through an extra litre and had to borrow 1/2 a litre more to get back while I haven't even touched reserve. He's also running taller gearing (a tooth less on the rear).
In saying that, I routinely get over 100kms out of my 9.5L. Have a mate with a 15 250R, running the same jetting over the same loops, at the same pace. A few times now he's chewed through an extra litre and had to borrow 1/2 a litre more to get back while I haven't even touched reserve. He's also running taller gearing (a tooth less on the rear).
adriano.ro
New member
After some rides I'm so confuse, N2ZJ@3 42,180 pulls hard only from bottom with no top end, N3CW@3 45,180 will be ok after 1/2 part. Very few information about 250 2014-... jetting chart. In teory witch needle is for this bike H,W,J ?
Jakobi
Super Moderator
In 1/2 clip variations from leanest to richest they are...
N89x=leanest
N3Cx
N3Ex
N8Rx
N2Zx
N4Dx
N3Vx
N4Ax
N6Mx=richest
The N2ZJ is running a full clip and a half richer than the other. You're also using a leaner pilot with the leaner needle diameter, which may/may not be improving the bottom end response.
You need to be methodical and compare apples to apples.
The 14 250 I setup runs 42 NEDW#2 175 and gets good fuel economy and line linear power.
With N3CW@3 45,180 you say it's OK after half throttle, but what is happening on the bottom end? Flat lacking power, or rough burble? I'd be inclined to drop to a 42/40 pilot, and see if it helps.
N89x=leanest
N3Cx
N3Ex
N8Rx
N2Zx
N4Dx
N3Vx
N4Ax
N6Mx=richest
The N2ZJ is running a full clip and a half richer than the other. You're also using a leaner pilot with the leaner needle diameter, which may/may not be improving the bottom end response.
You need to be methodical and compare apples to apples.
The 14 250 I setup runs 42 NEDW#2 175 and gets good fuel economy and line linear power.
With N3CW@3 45,180 you say it's OK after half throttle, but what is happening on the bottom end? Flat lacking power, or rough burble? I'd be inclined to drop to a 42/40 pilot, and see if it helps.
adriano.ro
New member
Flat power delivery,especially on quick throttle opening,clean sound,no burble. So 40 pilot will be to lean=to flat, I think.
Jakobi
Super Moderator
Alright, so why not try somewhere in between and see how it goes? Like N2ZJ#2? What results did that give?? (assuming you've already done this).
Or N3CW#4
If the 42 N2ZJ#3 gives good response off the bottom but no mid, have you tried leaning the main off a couple sizes to see if it helps?
Or N3CW#4
If the 42 N2ZJ#3 gives good response off the bottom but no mid, have you tried leaning the main off a couple sizes to see if it helps?
adriano.ro
New member
N2ZJ@2 Is super lean on middle. Today I will try N3CW @4 and N2ZJ@3 but with 175. I will post the results here.today I spoke with my friend and he got N8RW,just to se if that helps. N8RW @3 is like N2ZJ @2,5 right?
Jakobi
Super Moderator
Yep!
I often found a similar thing with the dual taper needles. They always feel a bit lean in the mid range. OK off the bottom, OK on the pipe, but a bit of a hole in the middle. The Suzuki NE needles have a 3rd taper that fills this void. Makes the power delivery more linear and less of a transition, and also supply much more fuel on the needle past 3/4 throttle (smaller main needed).
adriano.ro
New member
First thing, I have found NEDW 
tomorrow is here.
So I have tried 42 n3cw@4 180. Too rich on needle,main ok. Bad idle also. Next I have change needle on @3,way better idle,bike take revs on neutral very clean,no bog. No road test ,was too late.
What I found was a small hole and bad conection on cab rubber tube between carb an reed valve.
So, if tomorrow I have improvement with this needle but is too soft/lean on @3 I have to change it with N3EW @4, right?
I can't wait to try NEDW
tomorrow is here.So I have tried 42 n3cw@4 180. Too rich on needle,main ok. Bad idle also. Next I have change needle on @3,way better idle,bike take revs on neutral very clean,no bog. No road test ,was too late.
What I found was a small hole and bad conection on cab rubber tube between carb an reed valve.
So, if tomorrow I have improvement with this needle but is too soft/lean on @3 I have to change it with N3EW @4, right?
I can't wait to try NEDW
adriano.ro
New member
For now I tried n3cw@3 42 and 180. Is super quick, too quick , with good bottom. But after some investigations,tests I finde my real problem: choke ! Is mounted on handlebar, and isn't seal perfect on carb body. After some hard parts was unscrewed, and the bike fell super rich. Before trying any other needle I need to change the choke system.
, with good bottom. But after some investigations,tests I finde my real problem: choke ! Is mounted on handlebar, and isn't seal perfect on carb body. After some hard parts was unscrewed, and the bike fell super rich. Before trying any other needle I need to change the choke system.adriano.ro
New member
When I say too quick I mean is very responsive and really brutal on high revs. Is fun but on frozen terrain isn't good idea. Can I do wheeles on 3/4 part of throttle easily,with this set up you can win some motocross contests ))
But,tomorrow arrive my NEDW,so I'm focus on this needle.
))But,tomorrow arrive my NEDW,so I'm focus on this needle.
adriano.ro
New member
So, I have changed my needle with NEDW on second grove, 42p ,175 main temp ~3?C-5?C alt. 400m-1300m. So far ,so good. I have to play a bit with air screw for best response, otherwise the bike super clean and hard. I like it! Very nice top end power. If now runs ok on second grove, on summer I need to go on first or cam I change only the pilothe jet? Or like my friend on his his husqvarna wr 250 2t 2004 ,he just play with air screw.
adriano.ro
New member
After some rides bike runs good. A lot of bottom end ,good midle but I feel a bit to soft on top end,like too lean on man jet. My curent set up is 42 nedw@3 175 as 1.1/4 out. Isn't too big 178 main jet,will help this to have a bit more top end? With N3CW was oposite ,nice top end but not so good bottom end.
