needle choice

[cascade_crawler]

Recently got a 2011 250 with the 38mm AS2 carb. Havent been able to ride it due to a recovering injury but trying to sort the bike best I can before hitting the trails again. Sounds like the new carbs are quite particular about needle choice.

Previous owner had a N1EE needle, 38 pilot and 178 main. From my research it looks like the NEDW or N3EJ needles are the hot ticket. Has anyone ran both, how do they compare?

 

[Jakobi]

Recently got a 2011 250 with the 38mm AS2 carb. Havent been able to ride it due to a recovering injury but trying to sort the bike best I can before hitting the trails again. Sounds like the new carbs are quite particular about needle choice.

Previous owner had a N1EE needle, 38 pilot and 178 main. From my research it looks like the NEDW or N3EJ needles are the hot ticket. Has anyone ran both, how do they compare?

Heaps of threads on it.

I have ran basically all your list

38 N1EF#1 175
40 N3EJ#2 178
40 NEDJ#2 172

N1E was too rich for me. Nice delivery but sucked juiced and spooged in the slow stuff. Loaded up.

N3Ex is agressive delivery. Snappy right off idle and again in the mid/top. Nice hit and mad fun.

NEDx is smooth and linear. Doesn't feel that it has less/more power than the above. It just delivers it differently. Smooth bottom, strong top. No real hit just a mild transition between the two.

FWW grab one of each and try them yourself. It'll set you back all of $30 and a bit of your time.

 

[GMP]

250s and 300s are different animals, settings don't translate. Lots of 300 jetting experiments and settings here but this can just add confusion. PM gasgasman, he was running a JD Red needle in his '11 250 before he had the carb modded. This makes sense to me as the 250s with the older carbs like my '07 like the JD Blue(richer).

 

[Neil E.]

2011 with the 36mm. JD red #4 and 38 pilot at the moment. I expect my final setup will have the clip in #3 to lean it out a bit more. The temperature is dropping here (freezing rain last night) so I've left it at #4. It's been running better as it gets colder outside so that tells me it was still slightly rich.

 

[Jakobi]

Sorry,

Didn't read the 250 bit. MJC runs 40 NEDW 172 in his 250 with the 38mm. Swears by it.

 

[Rob_NZ]

Jakobi

Do you know which suzuki the NEDJ is from, or do you perhaps have a part number?
I'm keen to try one here in NZ.

It seems the 2010 with 38mm AS-II is a real in-between model. The 2012 bikes locally have the 36mm carb, the 2009 have the AS-I.

I've been off the bike for months with an injury and am now keen to get it right.

 

[Jakobi]

13383-37FM0 - NEEDLE, JET (NEDJ) - Suzuki OEM Parts

From a 2008 RM250. I agree that ours are the inbetweeners.

My current conditions here at the top of Aus are: 32C, 65% RH. Still riding at 300M and up to 1000M. 40P NEDJ#2 172M, on a 2010 EC300 with 38mm ASII. Wossner Forged Piston and rings (~20hrs). S3 Head running black (high high) insert. Squish 1.8mm using gasket stack to set port timing flush with port at BDC. 98RON fuel.

 

[cascade_crawler]

Sorry,

Didn't read the 250 bit. MJC runs 40 NEDW 172 in his 250 with the 38mm. Swears by it.

I found tons of threads on the 300, but not as many on the 250. Saw MJCs posts on the topic so I ordered up a NEDW to try out, using a 2008 rm250 as a reference. My local yamaha dealer doesnt stock needles so I'll have to order that one as well. For the conditions I ride the NEDW sounds just about right, especially since I'm coming off a very smooth hitting 300.

 

[kdxtreme]

Your bike came with a 38, sweet you'll like the hit for sure.

 

[Jakobi]

Considering its a 250, if you wanted to try the Yamaha needles I'd have to suggest a N3EW. Again pared with a 40P and a 178 main.

The J diameter might be a tad lean on the 250. In fact yamaha changed from a stock needle of N3EJ to a stock needle of N3EW around 2006 (i think.. don't quote me on the year) to stop pinging at lower openings under load.

 

[clw]

NEDH and NEDW, $12 including shipping for either one

 

[Rob_NZ]

13383-37FM0 - NEEDLE, JET (NEDJ) - Suzuki OEM Parts

From a 2008 RM250. I agree that ours are the inbetweeners.

My current conditions here at the top of Aus are: 32C, 65% RH. Still riding at 300M and up to 1000M. 40P NEDJ#2 172M, on a 2010 EC300 with 38mm ASII. Wossner Forged Piston and rings (~20hrs). S3 Head running black (high high) insert. Squish 1.8mm using gasket stack to set port timing flush with port at BDC. 98RON fuel.

My bike is stock, 95 Ron (compression not that high, no point running 98, it may run worse) , sea level to 600M occasionally. 15-25 deg C here.
Bike only has 30hrs on it due to me getting injured. Im back riding now.

Did you ever run that needle with the stock head?

 

[Jakobi]

Negative.

My sweet setup on the stock head was 38 N3CH#2/N3EH#2 175/178 depending on season. Even then it had trouble idling and was a bit rich transitioning onto the needle. The J diameter with a 40/42 would be my choice for best idle and off idle response. I have tried everything from F-J with all pilots.

I found that the high compression head made about a half a clip difference in the jetting, with me having to go a little bit richer to get the same sound/throttle response. It just stronger and a bit crisper/cleaner with the new head. Ie uses the fuel more efficiently to make more power.

 

[Rob_NZ]

It took a while, but I now have the NEDJ in my 2010 300 with 38mm AS-II carb.

It seems good, no more 1/8-1/4 throttle rich burble.