Revised Jetting Specs NEDW
- Thread starter Jakobi
- Start date
Rode for the 2nd time with the NEDW needle, with today being the hardest I've rode with it.
Off closed throttle seemed a bit soft. At 1/2 throttle on up,it ran like a scalded ape.
For wet slippery conditions, this needle would be perfect.
May go with a leaner off idle needle.
Off closed throttle seemed a bit soft. At 1/2 throttle on up,it ran like a scalded ape.
For wet slippery conditions, this needle would be perfect.
May go with a leaner off idle needle.
Jakobi
Super Moderator
I hear you GGM. What pilot and clip position did you end up settling with? I have found this needle very soft in the 1/4 to 1/2 throttle range. Not so much soft but just smooth. It still pulls and will lug its way up the steepest of hills. It just has no hit or snap until you get up higher into the revs.
Its definately boring, but works well when riding. You have a torquey predictable beast in the bottom end and a ball tearer up top.
Its definately boring, but works well when riding. You have a torquey predictable beast in the bottom end and a ball tearer up top.
40P
170M
Clip-middle
65F
I tried the clip in the #2 position, but the rpm was too slow to return to idle.
People mess with power valve springs etc. to change the throttle response.
A simple needle change is all you need.
Traction was excellent today, so the needle was too "soft" for me.
170M
Clip-middle
65F
I tried the clip in the #2 position, but the rpm was too slow to return to idle.
People mess with power valve springs etc. to change the throttle response.
A simple needle change is all you need.
Traction was excellent today, so the needle was too "soft" for me.
I am comparing your 250 to my experiences on a 300 too. So obviously there will be some big differences in off idle grunt with that alone. Keep us posted with your other updates and changes you make.
GGEvo
New member
Not so sure about this. I took all free play out of actuator plate (about 4-5 mm) and test rode today. A completely different bike, no lag - was crisp and responsive all through range, unbelievable!!!!! Only change to needle (N3EJ) was dropping to clip 3. I also had a fresh top end and high comp head so all these would have helped.
I will try the NEDW next weekend to see what improvements (if any) it will make.
Jakobi
Super Moderator
I agree. What needle are you comparing it to? N3? N1?
Did you try a 42 (or turn in the air screw) with #2, a little richness off the bottom might be all you need to get some pop back and not have it ring ding.
I thought you (and I) where both using JD red.
JP4
New member
I tried the NEDW. AS1 38mm, 2010 300, 42PJ, 175 main - 750 feet ASL, 15C.
I like this needle above 1/4 throttle - runs hard - straight up rips + 1/4 throttle. 0 - 1/4 throttle it's lame. In the single track I almost fell over rotating around trees waiting for some power to happen. I could bring it to life with some clutch, but I don't like to ride that.
I tried different PJs and clip positions, but this needle is just too soft off the bottom. Too bad, cause I really like it +1/4 throttle up.
Jakobi ... Can you find me a needle with that above-pilot hit like the NEDW, with some grunt off the bottom?
I'll go back to the N3EH (trying 2nd clip in the cold), in the interim.
Cheers,
Jason
I like this needle above 1/4 throttle - runs hard - straight up rips + 1/4 throttle. 0 - 1/4 throttle it's lame. In the single track I almost fell over rotating around trees waiting for some power to happen. I could bring it to life with some clutch, but I don't like to ride that.
I tried different PJs and clip positions, but this needle is just too soft off the bottom. Too bad, cause I really like it +1/4 throttle up.
Jakobi ... Can you find me a needle with that above-pilot hit like the NEDW, with some grunt off the bottom?
I'll go back to the N3EH (trying 2nd clip in the cold), in the interim.
Cheers,
Jason
I tried the NEDW and found the same; I'm now running a R1372DKA (99 CR250) and like it better, but still experimenting... with the 40 pilot had to go in on the airscrew to about 3/4 turn out, will try a 42 pilot soon, and 178 main after a good plug chop.
2011 250 race, 38 carb, 40P, 1372DKA 3rd clip, 180main, sea level to 800' msl, 40-60 deg F.
2011 250 race, 38 carb, 40P, 1372DKA 3rd clip, 180main, sea level to 800' msl, 40-60 deg F.
skid jackson
New member
11 250 6 day 36mm asII
nedw
temps 45 to 55f
the 45 in the 2 slot was too lean
45 in the 3 slot too rich
the 175 seemed a bit lean
put a 42 in and a 178, 3rd slot
This cleaned up the bottom quite nicely
and the 178 richened things up so the plug was comfortably dark but not nasty rich. just a tiny bit of spooge at the tip of the exhaust. thing is that even after it warmed up to about 55f I noticed that the 42 was a bit lean. it did this run on thing when you backed out of the throttle. It wasn't a worry because it was fine when on the gas. just bothersome.
Can't win .. 45 in the 2 slot too lean, 45 in the 3 slot too rich, 42 in the 3 slot too lean!! I'm going to put the 175 in and raise the needle to the 4 slot and see how that goes ... getting close though .... last set up was very ridable!!!
nedw
temps 45 to 55f
the 45 in the 2 slot was too lean
45 in the 3 slot too rich
the 175 seemed a bit lean
put a 42 in and a 178, 3rd slot
This cleaned up the bottom quite nicely
and the 178 richened things up so the plug was comfortably dark but not nasty rich. just a tiny bit of spooge at the tip of the exhaust. thing is that even after it warmed up to about 55f I noticed that the 42 was a bit lean. it did this run on thing when you backed out of the throttle. It wasn't a worry because it was fine when on the gas. just bothersome.
Can't win .. 45 in the 2 slot too lean, 45 in the 3 slot too rich, 42 in the 3 slot too lean!! I'm going to put the 175 in and raise the needle to the 4 slot and see how that goes ... getting close though .... last set up was very ridable!!!
twowheels
New member
Sounds like you need to get one of those half-clip washers to slide over the needle. If 2 i too lean and 3 is too rich, 2-1/2 should be just about right
GMP
Active member
Don't use the washers unless you machine the slide well where the needle clip sits the thickness of the washer deeper, I beleive .45mm or half a clip position. If you do not, the retainer will bottom on the washer or clip, and the needle will not float. This accelerates wear on both needle and nozzle. On my '03 I did this with good results before getting a JD kit. For any given needle in a standard clip position you run the washer under the clip. For a half clip leaner you run it over the clip. For a half clip richer you lower the clip one position and run the washer over the clip.
GMP
Active member
rxmx,
Those Honda needles are like standard Keihin needles with an addioional shallow taper. I tried the 1369 version in my '03 250 but it was lean even with a #6 slide.
Have you tried any of the D series needles like the DDK, DEK? In the older PWK38s at least, these put all 250s well in the ballpark, even a Husky 250 with a Keihin conversion was very close. I know the new carbs seem to run a little different but its worth a try to see where they fall, and all bikes are a little different. Lots of options in that range too including straight diameters. If you can get it close with a DDK/DEK, a JD Blue will likely polish it up nicely.
Those Honda needles are like standard Keihin needles with an addioional shallow taper. I tried the 1369 version in my '03 250 but it was lean even with a #6 slide.
Have you tried any of the D series needles like the DDK, DEK? In the older PWK38s at least, these put all 250s well in the ballpark, even a Husky 250 with a Keihin conversion was very close. I know the new carbs seem to run a little different but its worth a try to see where they fall, and all bikes are a little different. Lots of options in that range too including straight diameters. If you can get it close with a DDK/DEK, a JD Blue will likely polish it up nicely.
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