Jetting Database - PLEASE ADD YOUR SETTINGS

[hannesd]

This thread is a database for others to view people's jetting setups so discussion doesn't really take place here. There are plenty of threads re spooge and what it means but essentially it just indicates your oil of choice isn't reaching its flash point and burning off prior to escaping via the exhaust port. Could be due to running rich could just be that you're a lugger using less then half throttle all the time could be you're using a race type 2 stroke oil with a high flash point which you'll never reach trail riding.

For more discussion start a new thread or search for precious ones there are heaps.

ok thanks

 

[Gibby]

2013 xc300r south alabama

2nd jetting post, 1rst post feb,2013
Bike= 2013 xc300r 38mm as2,
elevation= 0 sea level - 500ft gulf of mexico.
main jet = 178
pilot jet = 42
needle = n3cj 3rd middle clip.
airscrew = 1 3/4 out
slide = #7
float height = 2mm above stock
premix 93 octane 44:1 amsoil dominator.
I have tried n1ef and n3ch, n3ch was better than stock but lacked bottom end grunt. After reading Simmo737 jetting post and Jacobi post, I
tried the n3cj and 178 main
man did this thing come Alive with low end power and keeps on kicking through top end and I have noticed fuel mileage has increased.
Thanks for the post guys I would not got here with out them !

Good Riding to all!!

 

[Simmo737]

It's all jakes work, I just report the results.

 

[Gibby]

2013 xc300r south alabama

Oz,
I see where you changed to the:
main = 175
pilot = 40
needle = nedw 2nd from top
slide = #7
from the 178 main, n3cj needle 3rd, 42 pilot.
I have not done any head mod but I have purchased the nedw needle.
I like the the power delivery with the n3cj and 178 main, 42 pilot, it does spooge alittle,great low end, seems to lack aliitle in the middle with hard hit on top. Way better than stock though. I ride tight single track. do you think I should try the nedw, 175 main, 40 pilot? What changes did you notice?

Thanks,

 

[n_green]

Bike year & model = 2011 EC300E fitted with 38mm PWK ASII carb and reed block spacer and fitted with modified head
(squish - 1.45mm, compression ratio - 12.7:1)
Temperature (degC) = 14 - 18 degC,
65% - 80% humidity
Elevation (feet) = 1000f, or 300-500m.
Main jet = 175
Pilot jet = 42
Needle & notch = NEDJ #2
Air screw setting = 7/8's turn out
Throttle valve/slide = 7 non notched

Results:
Good torquey power lugs down quite well, once on the needle it felt good, had good strong power throughout the rev range, though felt rich from 3/4 throttle onwards and fell slightly flat. A user friendly and forgiving needle for tight single track, oodles of torque down low that builds into a nice smooth strong mid and top end. Not as explosive as the N3 series needles, which in my case is a good thing as I enjoy riding the more technical terrain where the N3 series needles wears you out..
The fuel economy is great for once
10l used for 110k's on day 1 (50k's flowing single/twin trail with hills, 50k's fire trail)
6l used for 90k's on day 2 (90% fire trail).

 

[n_green]

Bike year & model = 2011 EC300E fitted with oval bored 36mm x 39mm PWK ASII carb and reed block spacer and fitted with modified head
(squish - 1.45mm, compression ratio - 12.7:1)
Temperature (degC) = 22 - 28 degC,
40% - 60% humidity
Elevation (feet) = 3000f, or 900-1100m.
Main jet = 170
Pilot jet = 40
Needle & notch = NECJ #2
Air screw setting = 1.25 turns out
Throttle valve/slide = 6.5 notched

Results:
Good torquey power lugs down quite well, once on the needle it felt good, had good strong power throughout the rev range, though felt rich from about 1/2 throttle onwards and fell slightly flat. A user friendly and forgiving needle for tight single track, oodles of torque down low that builds into a nice smooth strong mid and top end.
The fuel economy is great for once
11.2l used for 118k's (the last 20 k's were done on reserve and on fire trails at a conservative pace
[/QUOTE]

 

[n_green]

Bike year & model = 2011 EC300E fitted with oval bored 36mm x 39mm PWK ASII carb and reed block spacer and fitted with modified head
(squish - 1.45mm, compression ratio - 12.7:1)
Temperature (degC) = 25 - 30 degC,
40% - 60% humidity
Elevation (feet) = 3000f, or 900-1100m.
Main jet = 168
Pilot jet = 40
Needle & notch = NECJ #2
Air screw setting = 1.25 turns out
Throttle valve/slide = 6.5 notched

Results:
Good torquey power lugs down quite well, once on the needle it felt good, had good strong power throughout the rev range. A user friendly and forgiving needle for tight single track, oodles of torque down low that builds into a nice smooth strong mid and top end. Could have gone one step leaner on the main as it was still a bit rich, but it made good power and had good over rev so I'd prefer to leave it safe.
The fuel economy is great for once
7.2l for 76k's. Nearly all of it single track at a decent 2nd/3rd gear pace.

 

[mjtursky]

One more for the database

Bike year & model = 2002 EC250
Temperature (degF) = 40~75F
Elevation (feet) = 1100 ft
Main jet = 178
Pilot jet = 42
Needle & notch = CEL 3rd clip
Air screw setting = 1-1/4 to 1-3/4
Throttle valve/slide = 6.0 w/ notch

Results:
Good steady idle with good mid range hit. No loading up at low speed and clean transition.

 

[KTMAndy]

What is the difference between all the needles? Mine says n1ef the book lists an n1ec? I keep reading people using JDKH01 blue? CCK etc.

Has anyone got a link that cross references the different needle types and where to buy them from?

I am progressing with playing with the jets and theoretically I understand the amount of fuel/ air the jet would deliver if I move it up the clip. But what is the difference in the actual needles?

 

[Jakobi]

Have a search or start a new thread Andy. Simply put, needles can have various straight sections, diameters, and any number of tapers to their profile to supply varying amounts of fuel across the throttle range. The jets (pilot and main) only really impact on either end of the needles action.

 

[KTMAndy]

Thanks Jakobi my gasser keeps 'teaching' me knew things to learn. The gas gas forum helps with the answers too.

 

[Packman]

I haven't tested mine over a 2 or 3 hour period yet. I will try it this weekend and let you know how I fare with the mileage. With the N1EF needle, the bike was very good on gas.

Im seeing about 6-7 miles per litre

 

[Vindicator]

Bike year & model = 2011 EC300 Race
Temperature (degC) =15-20
Elevation = Sea level
Main jet = 180
Pilot jet =38
Needle & notch =N1EG / #2
Air screw setting =2
Throttle valve/slide =#7
Keihin PWK 38

I like the power delivery of the N1EF but it's too rich off idle. Got the N1EG and there was an improvement but had to go down on the pilot jet (previous 40). Good transition off idle into middle range and soft hit when WOT. Still a bit tricky to idle but a bit better than before. Air screw still bares almost no influence on idle, might have to go down again on the pilot jet.
Tried the N3CJ #3, MJ180, PJ40 but too much of a hit when WOT.

After a few tests with the N3CJ (again) with:
Temperature (degC) =15-20
Elevation = Sea level
Main jet = 178
Pilot jet =45
Needle & notch =N3CJ / #4
Air screw setting =1,5
Throttle valve/slide =#7
Keihin PWK 38

Found this combination to work well but couldn't help noticing it a bit lean at 1/4 throttle and with lack of grunt especially on gnarly up hills where you have to avoid the power valve to open to prevent the bike from flipping over.
Hence, I moved to the next step richer needle N3CW (thanks Jakobi) and kept the same settings :

Temperature (degC) =15-20
Elevation = Sea level
Main jet = 178
Pilot jet =45
Needle & notch =N3CW / #4
Air screw setting =1,5
Throttle valve/slide =#7
Keihin PWK 38

Now I have low end grunt and the lean feeling vanished. I still need to work on the airscrew a bit but I'm happy with the overall result for this altitude and temp. For my riding area I think the N3CJ is definitely a needle to consider when the temp gets warmer . With the N3CJ I was getting +130Kms with the Clark tank, did not test yet with N3CW

 

[thejackrabbit]

Bike year & model = 2006 EC 200
Temperature (degF) = 70-85
Elevation (feet) = 1,000
Main jet = 178
Pilot jet = 40
Needle & notch = N3EJ 4th notch
Air screw setting = 1 - 1.5 out
Throttle valve/slide = 5

Results: hard hit, could really use a 6 slide, strong mid and top, bottom could be better i might switch back to a 42. lots of spooge partly from castor 927 a lot less with amsoil, bike still ran good in 40 degree weather

 

[Zman]

Bike year & model = 2004 DE300
Temperature (deg F) =50-80
Elevation = 600ft
Main jet = 178
Pilot jet =42
Needle & notch =cck #3
Air screw setting =2 3/4
Throttle valve/slide =#7
Keihin PWK 38

Bike year & model = 2004 DE300
Temperature (deg F) =20 -50
Elevation = 600ft
Main jet = 182
Pilot jet =45
Needle & notch =cck / #2
Air screw setting =2
Throttle valve/slide =#7
Keihin PWK 38
This cold weather jetting seems very close but I need to still check WOT plug reading.

 

[britishgas]

2012 300cc , uk setup

175 main 40 pilot nedw 3rd clip air screw two out, brilliant setup for uk weather, pulls smoothly in every gear

 

[Simmo737]

13 ec300r with the new barrel

38 necj/3 172
Full on rev machine, very quick onto the pipe. Starts super easy on choke and when hot.

Might try nedj/3 for a touch more low mid range grunt but the 38 pj is good

Edit: great awesome jetting.... The flat spot was a lack of grip last time out so I must of been looking for traction in way too higher gear, with no roll on. Yesterday I rode same trails in absolutely perfect conditions, think fresh bluebird powder if you ski... And the thing just rocks! It wil tick over up a flag pole and screams at wot. Only problem was it spat some coolant on a tricky hill that I faffed up and needed some clutch abuse to negotiate, I'm not certain I had the cap on properly though as I had checked it prior to riding and never had this or any gasser spit coolant, it spat about 150ml. It was 29 deg Celsius and I broke the golden rule (I shut down at top of hill straight away). I'll do same hill affine next time I'm sure

No other signs of being hot all day, and I was up it for the rent, I was absolutely roo ted after 64 ks following a vv good rider.

 

[n_green]

13 ec300r with the new barrel



38 necj/3 172

Full on rev machine, very quick onto the pipe. Starts super easy on choke and when hot.



Might try nedj/3 for a touch more low mid range grunt but the 38 pj is good

How is the new barrel for economy?

 

[Simmo737]

Gooderer than my 11, somewhere between 100 and 120 ks per tank so far, mainly the 120 results unless it's been very wet, be interesting to see how this leaner main affects the fuel, I was too rich at 175, it revs out really well now.

 

[n_green]

Gooderer than my 11, somewhere between 100 and 120 ks per tank so far, mainly the 120 results unless it's been very wet, be interesting to see how this leaner main affects the fuel, I was too rich at 175, it revs out really well now.

That settles it. I'm getting a new one