2018 Ec300 Jetting Specs
 

Does anyone have any solid Jetting specs for the 2018 EC 300
Sea level, Hard Enduro stuff. A wee bit on the rich side ok.
Cheers

IIRC I believe all dealers were sent info on this.
Otherwise I'm sure GGNA will have info for you. Try reaching out to them and I'm sure they will have a jetting table or better for you.

I went a clip leaner. It helped a lot. I was going to try a leaner pilot but I got a lectron instead. :D

My 2018 EC 300 here in Italy run very good with N2ZG 2^ 42-178 (0-10 degrees, 200-1000 mt)

How do you like the Lectron on the 2018? What did it do for the power delivery?

My 18 power comes on way stronger then my 2011...

NECJ #2
MJ 175
PJ 42
AS 1 1/4
1000ft alt
65 - 85 degrees f.
95-98 octane gas

Thanks Keg I will give it a try.
Went out today with
178 Main
45 pilot
#1 standard clip
AS 2turns out
And had a bog off of idle
Thanks for the help
Martin

Anyone tried the N3CH needle yet? It worked very good in the previous models. Rode my 18’ for the first time yesterday and the N1EF needle is just awful. Zero bottom end and then explodes into mega power in the mid to top. Makes it nearly unrideable in anything technical


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I have the N3cj in mine, still slightly spoogy down the pipe running stock jets, 42/175 but sings nicely everywhere else. I?ll throw a 40 pilot in when I can be bothered to clean it right up.

Has anyone tried Suzuki needle necj?
In my old yz250x ?16 i run n3ew and n3cw maybe that works for gg300.?
I dont like the stock jetting in my gg300?18 way to rich for level.

Yes, Keg 👆

Different needles, different delivery, however not a whole lot of fuelling variance across the brands when it comes to the 72x72 300cc donks. Pretty much all running Vforce reeds coupled with a Keihin 36/38mm carb, and a free flowing exhaust. Ports for smooth power and excess squish/lowish comp.

Just a matter of finding a taper that provides the delivery style you like and then matching the clip position, pilot (and needle diameter; and/or slide number), and mains to suit particular engine and conditions.

You have to throw that garbage stock needle in the trash can. It is terrible. Goes from lean to rich and causes the bike to have weak bottom end and then explode into mid-range.

I like the NEDJ or N3CH needles


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Got my needles in today. I have the NECJ needle, N3CH and N3CJ. What main and pilot have you tried in with the N3CH? I'm east coast, sea level to 1000ft.

With the N3xx needles you will have to run a pretty fat main jet. I run N3CH 3rd clip, 180 main 42p A.S. 1.5 and jetting is spot onhttps://uploads.tapatalk-cdn.com/201...aed1a81aad.jpg


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Thanks for sharing. I have KEGS setting in there right now and will ride with it Friday and then try the N3XX combo after a few laps. Thanks!

NECJ was just too lean for my bike. Going to try the N3CH setup and also an NEDH for comparison.

Back to #3 for most riding.

NEDW #3 for the GP300 is pretty good too.

Now my EC 300 2018 work perfect with NEDW at 3

MJ 172
PJ 42
AS 1 1/2
Alt sea level
5-15 degrees C.
95-98 octane gas

but remove this damn cable choke, it is the cause of the majority of the problems

I was also told to ditch the choke. Plan to do that as well.

Hi, since the last reprogramming of the CDI, I have the slow motion which remains a little elevated before falling back, have you noticed the same thing?

NEDW 3
MJ 172
PJ 42
AS 1 1/2
Alt niveau de la mer
20 degr?s C.
Gaz ? 95-98 octane

2018 Ec 300. Installed a pull choke. 0-1000 feet
AS 1.5 turns
42 P
NEDW 2nd clip position. Still had a slight burble on the 3rd position.
175 Main

Working very well in the drive way but need to trail ride it tomorrow.

Bike worked fantastic today. Mind you it's cooling off here now. About 15C here today.

Hey I've got the n3cj in mine as well middle clip stock jets what clip are you on ?

I was running it on #2. But I am now running NEDW #2 with 40 pilot and a 172 main. It could even go down to a 38. Buttery smooth everywhere with a nice punch up top.

.
Thanks nate I will give #2 a go where do you get nedw from ?

Suzuki needle, https://www.partzilla.com/product/suzuki/13383-37FL0

I have just changed to a nedw and 42 pilot as my bike came with a 40. Clip position 3 still had a bit of a stutter at cruising speeds, better than the stock needle. I Changed to clip position 2 and it has smoothed out nicely.

The only complaint is i am lacking a little snap off the crack of the throttle now....any pointers? I am just learning the jetting game...

NECW#3 will put you right between the 2 settings. You could try a richer diameter like a H, bump up the pilot one more, or tweak the air screw to get some punch back off idle.

The thing is, these PWK carbs have no squirt jets like a 4T carb gets. If you snap the throttle on a 250F for instance, the carb says yep and pumps fuel straight down its throat to give it punch. On the 2 banger you either have to run rich enough to have the excess fuel available and live with some burbling, or have smoother delivery and compensate with some clutch use.

I made some progress with the air screw i started at 2 turns out, ended back to 1 turn out. Improved but still not quite as instant as i was hoping. Maybe i am being too picky, it is much better everywhere else and smooth as silk now. Only a fraction of the spooge compared to the n1ef....

I was weighing up between the necw and nedw. Might be worth a try.

So i have settled on Nedw clip 2, 40p, 175m and AS 1 turn out. Improved the snap off the bottom and pulling clean everywhere. Smooth as silk, minimal spooge.

About the same as where most of us end up mate!!

Happy days.

Whats the difference between NECW and NEDW?

NECW is half a clip leaner than NEDW I believe...

Thank you!

So starting to get a little frustrated with getting the jetting dialed in on my GP300
I started with an N3CJ 180 main and 42 pilot A/S was about .75 turns out. After a long section lugging the bike I would get an idle surge which sounded like the bike was hot or lean. The bike was not hot and this only starts happening after lugging the bike for an extended time.
So I am thinking I am way rich so I put a 175 main, 40 pilot in and changed to a NEDW needle. So improvement here but not huge. Still got the surging but would stop about 30-40 seconds of idling.
So figuring I was still rich I dropped to a 38 pilot, this gave me a severe lean bog off idle only thing that would get rid of it was turning the idle screw all the way in. So I know I'm lean on the pilot I went back to the 40.
I think I am getting a lot of unburned fuel accumulating in the head, and pipe that is causing the surging. Now one thing I did notice as I was closing the shop last night that my idle was pretty high. Wondering if this could be the problem, where would this affect the jetting?
Now one other thing in the mix is I have been riding with 13/48 gearing that came stock, just changed to my normal 13/50. I just want to get this bike to how my 13 ran, unload it off the truck put it in 3rd gear, get back to the truck and take it out of third gear.
Does anyone have any insight?

Visually or audibly set the slide. If you back the idle out and gently lift and drop the slide you'll hear the slide bottom against the carb vs bottoming against the plastic idle screw. From there tweak it just a tad till it's only just open. Or.. have a look down the intake of the carb and set it so there is a mm or two just showing under the slide. That is all it needs to idle (IF everything else is correct).

A 42 pilot and J diameter isn't that different to a 40 pilot and a W diameter, and you also established that moving leaner on the pilot doesn't work.

I would be running a 42 pilot and W diameter.. or even a 45 and working with the air screw between at 1.5 turns (or about a quarter turn each side of).

I am going to give the 42 a try again, probably should have just kept turning the air screw out. When I was experiencing this I thought I was running lean, when I did turn the air screw out I didn't notice any change so thinking I was lean I went back in with the air screw.
I got a big ride this weekend 200 miles of mainly single track so I will have some time to jet on the trail. Although it's going to be a sand run so I'll probably be on the pipe quite a bit, unlike the rocky single track I usually ride. I'll bring my jets and needles with me and try a few different things.

Its strange as all the symptoms you name are typical for a lean condition. Surging is typically as well as high idle or an idle hang.
Go back to the 42 pilot jet and try to set the idle as low as possible as Jakobi suggested. Warm the motor up, dont let it idle, drive the bike a few minutes. Then turn the idle set screw until the idle is approximately 4 to 5 hundred RPM's too high. Let it idle high and close the air screw until it bottoms, no froce here. Turn the idle screw counter clockwise for a half turn, let the motor settle for 15 seconds. 15 seconds is a long time when you are waiting, so please be patient.

Turn the air screw quarter turns out and let the engine settle for 15 seconds every time you turn the air screw. Repeat this until you have reached the highest rpm, then turn the idle set screw out until the idle is low. Remember, the lowest idle would be best.

If you have turned the air screw less than one turn to achieve the highest rpm your pilot jet is too small. If you turned the air screw more than 2.75 turns out to achieve highest rpm your pilot jet is too rich.

Good luck!