Ec 300 2008

[Jacob 'Berg]

Originally Posted by 5valve

While waiting for jets'n needle, did a ride with:
N1EF #1
168
42
https://www.youtube.com/watch?v=J0A4...ature=youtu.be



Now, Jacob 'Bergs settings came in sooner, so today installed

CEK#3
175
38

Difference (quick test) is: more power everywhere, smoothed transition to valve, meaty torque.
Have yet to test it in real terrain.
On the other hand..its super LEAN, at least in hi rpm range.. So, Jacob, raising needle or giving a go to bigger main?

Try a 178 main. If it is better, but still lean on top, go with the 180. If you still feel it is lean after richening up the main, go to position #4 and start leaning the main out until it is running smooth at all throttle openings.

[5valve]

Tried 178 - lean, 180 - lean, no matter the clip position, except full raised not tested.
Im thinking either 182 or 185, which I dont have to test.
Also, next ritcher needle from CEK at middle openings is CCK and at middle to top throtthle is DCK.
So deciding between needle or jets.
Have whole range from 168 to 180.

Pilot jet, I believe, could still be lowered from 38, being tad ritch at idle, but at the moment I'm keeping it, since all but idle is on the lean side, so I get enough fuel at least on small openings.


Of course inconsistent idle is still present, from barely running, to high idle.
Both idle speeds would be acceptable, I they wouldn't change back and forth.

Fine tuning (idle knob and air) can't make it run any other rpm than super slow or tad high.
Which ever of the two speeds I adjust it to idle, it isn't fixed, but again it autoselects speed, based on bike inclination and other undefined parameters.

[Jacob 'Berg]

Sounds like you have an air leak somewhere? That would explain the erratic idle. Seems to me you should be in the ballpark with the CEK at higher clip positions and with the richer jets. I just moved to clip position #4 on the CEK as it starting to warm up here and bike was starting to run rich.

[5valve]

Since topic is old but alive, I refreshed top and bottom end, all gaskets, seals.
It's winter time here, so cold.
I'll post my settings, for better understanding of the whole picture.

New wossner piston
0.5mm base gasket (previously 1mm, and before that 1.3mm)
1.45mm squish (moved it closer to the upper suggested limit 1.1 - 1.5, as advised by tuner)
12.7:1 compression, head modded

AS1
PJ 38
MJ 178
CEK#3 and #4

#3 makes it pretty unrideable in slow, steep, technical stuff, but in open it rolls.
#4 transforms it into excellent crawler, pretty much like a 4T, little wheelspin, tractable up to 1/2 throtthle.
Snow riding 3rd, 4th gear, uphill, mid rpms, it just excels, with little handlebar pull, very predictable, with much grunt.
Bike clears quickly when going on pipe after prolongued low rpm cold riding. In winter a thermostat would be better, to keep some heat.

Still some carb fiddling is needed, as bike is tad rich down low.
Rarely ride it pinned for extended time, could be lean at top rpm's, but no need to fix it atm, as we mostly ride slow to mid rpms with occasional bursts uphill.

[adriano.ro]

Originally Posted by 5valve

gassergrant, its Slovenia, just outside capital. "small" patch of forrest, hills, creeks, fire roads, about 30s from my house.

So Jakobi's advice is to use N3EG combo, practically identical to gassergant 's.
Is this jetting combo N3EG#3, 38-40, 178 tempeture sensitive for winter/summer jets changes being a must, or just finetuning of air screw and maybe needle height is enough to compensate?
Riding temeratures range from 23F to 95F, mostly being in 50/77 range. Never extremely humid.


I do have in grasp KTM needles, N84K, N2ZK, N2ZW and N2ZL, but being "2", I presume are not OK.
Jets i have enough, to test.

CCK and CEK are keihin brand needles, do they correlate to any OEM?

I dont have JD spreadsheet.

I have the same needle N2ZW,did you try this? For now I have this and N1EF,and I just ordered N3EG. CCK ,I read good things about this needle but seems to decrease mpg. Anyway just take a look at this video,where I use 40 N2ZW@3 175 7slide temp ~5℃ elevation arounde 700m.

https://youtu.be/9SGYsSt971g

Good tourqe but away too rich in 1/8-11
/4 whit no spoonge?!!

[adriano.ro]

Originally Posted by 5valve

gassergrant, its Slovenia, just outside capital. "small" patch of forrest, hills, creeks, fire roads, about 30s from my house.

So Jakobi's advice is to use N3EG combo, practically identical to gassergant 's.
Is this jetting combo N3EG#3, 38-40, 178 tempeture sensitive for winter/summer jets changes being a must, or just finetuning of air screw and maybe needle height is enough to compensate?
Riding temeratures range from 23F to 95F, mostly being in 50/77 range. Never extremely humid.


I do have in grasp KTM needles, N84K, N2ZK, N2ZW and N2ZL, but being "2", I presume are not OK.
Jets i have enough, to test.

CCK and CEK are keihin brand needles, do they correlate to any OEM?

I dont have JD spreadsheet.

I have the same needle N2ZW,did you try this? For now I have this and N1EF,and I just ordered N3EG. CCK ,I read good things about this needle but seems to decrease mpg. Anyway just take a look at this video,for me,seams too rich,where I use 40 N2ZW@3 175 7slide temp ~5℃ elevation arounde 700m.

https://youtu.be/9SGYsSt971g

Good tourqe but away too rich in 1/8-11
/4 but whit no spoonge?!!
And why N2xx aren't good?

[Jakobi]

Z is the needle diameter of the straight section of the needle. It covers idle to 1/8-1/4 depending on the needles taper profile. Sizes range from:

Nxxx needle diameters
D=2.685mm
E=2.695mm (JD Blue)
F=2.705mm
G= 2.715
H= 2.725
W/I=2.735 (JD Red)
J= 2.745
K=2.755

In 1/2 clip variations from leanest to richest they are...
N89x=leanest
N3Cx
N3Ex
N8Rx
N2Zx
N4Dx
N3Vx
N4Ax
N6Mx=richest


So N2ZW#3 is on par with N3EW#2.

[adriano.ro]

So my n2zw too lean. I will try one again whit n1ef ,I want to stay away from lean part. I have also NOZH.

I will receive next jetts in about 3 weeks.
Tnx Jakobi once again.

[adriano.ro]

Witch pilot an main to use with n1ef?

[lonetree]

throw that bloody n1xx needle away, will only cause trouble. i have a 09 and had a 250 and 300. im at sea level and love the n3XXneedles, pilots are around 38, with 178-180 mains, the older carbies tend to need a slightly richer setting.