Jetting Database - PLEASE ADD YOUR SETTINGS

[symon260z]

Ec300 2019

Here is what works for me on my 2019 EC300

NEDW needle set at the 2nd for the top
40 Pilot
175 Main Jet
Air screw about 2 turns
98 octane fuel
Motul 800 at 2%

I ride at between sea level and 400 ft, normally quite humid 70% + and it is pretty hot around here all year round at least 25?c.

It is early days for me on my new Gasser but with these settings the bike runs very cleanly, almost like it has fuel injection rather than a carb.

 

[Davehuge]

Here is what works for me on my 2019 EC300

Thanks for sharing your jetting.

You're in China?

Do you have a dealer in China?

 

[ReaptheHeat]

Hey Guys, been struggling with jetting ever since I have owned this thing

Bike: 2012 EC300
Mods: None
Altitude: 5400-8000
Temp: 35-50 F

Pilot: 42
Needle: JD Blue
Clip Pos: 2
Main Jet: 170

I have had the JD Red needle at #3 clip for a bit, and could never get the 0-1/4 throttle dialed in. It gurgled at this small throttle opening I always had spooge running down my silencer, and assumed I was way too rich.

I put in the JD Blue at #2 which is richer at the 0 to 1/4 opening, and holy cow. WAY more power

 

[swazi_matt]

180 main 40 pj and necj 2nd clip sea level

Didn’t feel lean (actually a bit rich at about 1/4 throttle) but this plug looks a bit lean. Up and down fairly fast stuff but not for extended periods

(It was an old plug that had rich jetting previously)

Any opinions? ( @jakobi ? )


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[Moto7man]

180 main 40 pj and necj 2nd clip sea level

Didn?t feel lean (actually a bit rich at about 1/4 throttle) but this plug looks a bit lean. Up and down fairly fast stuff but not for extended periods

(It was an old plug that had rich jetting previously)

Any opinions? ( @jakobi ? )



Sent from my iPhone using Tapatalk

Imho, it looks lean to me.

 

[Jim Cook]

Matt,
It's running lean at at least one throttle position which you were using a good bit during the ride.
It is entirely possible to run lean in one circuit of the carb, while running rich in another.
Normally, it's the wfo top gear runs that do that (turn the plug white), at least on my machines when I do long stretches of gravel road at high speeds.
When I was running a bike with a AS1 carb, and the weather was cool, I often ran a 185 main for hare scramble racing. The rest of the carb's settings can be adjusted to work just fine with the 185 main.

Happy New Year!
Jim



.

 

[RudolfHucker]

If it were me, I would start with a brand new plug ang go from there.

The plug pictured has too much history and won't give you a clear picture of what your engine is doing right now.

 

[Jakobi]

Given the taper on the needle, I don't think the 180 main is your lean area... unless if you have an air leak somewhere (stator seal, reed gasket, etc).

I would be looking at the off idle area. J diameter, reasonably lean clip position, reasonably small pilot. Throw in some hills and some high engine loads and you can get things pretty warm.

You didn't mention temps, or humidity.. but I would guess low 20's? and pretty moist.

Similar conditions here in Australia.. usually a bit warmer, and a bit more elevation and I have found NEC#2 is too lean. I lose power and it's the only time I have boiled over (cutting through waist high grass up a steep incline). NED#2 works a treat.. NEC#3 would probably be alright too.

 

[swazi_matt]

Was thinking of throwing in the nedj just to be safe. I did think of doing some proper jetting runs before going out on the trail ride but 6 months without a bike and the two stroke fumes went straight to my head lol.

Still trying to find somewhere to do jetting tests not sure if I’m allowed to burn it up and down the street here?


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[Harry]

Matt,
Burning it up and down the street in NZ is likely to attract the fun police.

 

[ReaptheHeat]

2018 XC 250

Altitude: 6000-9000 ft

Temp: 55 F

Pilot: 38

AS: 1.5

Needle: Stock @ #2

Main: 168

Little bit of spooge after a 1.5 hour race today, mostly on the needle. When I am WFO, feels like it never tops out. Is this more of a lean or rich symptom?

Otherwise, I might throw in the JD red or Blue to see how it feels.

 

[ReaptheHeat]

2018 XC 250

Altitude: 6000-9000 ft

Temp: 55 F

Pilot: 38

AS: 1.5

Needle: Stock @ #2

Main: 168

Little bit of spooge after a 1.5 hour race today, mostly on the needle. When I am WFO, feels like it never tops out.

Otherwise, I might throw in the JD red or Blue to see how it feels.

Rode at 5000 ft 70 F.

JD Blue #2, 38 PJ, 170 Main. Excellent feel, could probably run a 168 main. This is the best I have gotten either my 2012 or 2018 jetted. Too bad I rarely ride this low in elevation. Zero spooge.

The kit rec. 42 PJ, Red #3, and 168 Main for 5000 to 8000 ft. I found the PJ to load up too easily for lugging, then feels lean down low with the smaller 1/4 needle taper, then opens up to a nice powerband.

Is there a needle one step leaner than the JD blue with the same taper profile?

 

[Jinx_pt]

Gasgas 300 R 2013

Hello!

So, after reading a lot in the forum, testing with the bike and see how it feels, jetting is like this.

AS2 carburetor
Needle & notch =NECW #2
Main jet = 172
Pilot jet = 42
Air screw setting = 2 1/4
Throttle valve:7
Fuel: 95 oct (can use 98 if better for jetting)
Oil:MOTOREX CROSS POWER 2T at 1.5%
Elevation: Sea level to 500m
Temp C?: Summer 20 to 35 / Winter 0 to 15
Riding type: Hard enduro single track and rocky creeks.


I had problems with fouling plugs, just the usual with gasgas factory settings so i had to deal with it. Adjust float level, clean the air filter, carb, pipe and muffler. After all that, changed stock needle
Bike goes a lot better, smooth but with power, starts easy even after a crash (before had to try several times) and fuel consumption has improved a lot!!

I just started with jetting, so if the jetting gurus see that any setting is wrong or could be a bit better please tell me!!

Thanks

Edit: Been using 98 oct from the local pump and plug have a better color!!

 

[Davehuge]

I just started with jetting, so if the jetting gurus see that any setting is wrong or could be a bit better please tell me!!

Thanks

Hi, I don't call myself an expert but the only thing I could suggest is trying a smaller pilot as your Air Screw is 2 1/4 turns out. Of course, if it's running nicely then why bother?

My jetting is pretty similar to yours, although mine is a 2004 EC300 with the AS1 carburetor.

All the best, Dave.

P.S. I love Portugal, where are you in Portugal?

 

[Jinx_pt]

Hi, I don't call myself an expert but the only thing I could suggest is trying a smaller pilot as your Air Screw is 2 1/4 turns out. Of course, if it's running nicely then why bother?

My jetting is pretty similar to yours, although mine is a 2004 EC300 with the AS1 carburetor.

All the best, Dave.

P.S. I love Portugal, where are you in Portugal?

Yes, i was thinking of going with a 40PJ, but if i can manage with the 42PJ during summer, (since i dont ride a lot in the summer, too damm hot ) later in winter that air screw will be close a little.

I live close to Porto and even closer to Lagares, home of one of the best hard enduro events, the Extreme XL Lagares.

Thanks for your replay Dave.

 

[Davehuge]

Sounds like a good idea.

Have fun!

All the best, Dave.

 

[rodent]

Bike year & model ='19
Temperature (degF) =53
Elevation (feet) =900
Main jet =175
Pilot jet =42
Needle & notch =NECW/3rd
Air screw setting =1 1/2
Throttle valve/slide =Standard(I didn't look )

When I got the bike new it had an N1ef needle in it and the sucker was very fat on the last 1/4 of throttle when rolled on from low speed in top gear.

I've since changed to NECW and left the jetting the same, went out today and down low the bike feels substantially "crisper/responsive"

Not near as bad as before, when you roll it on in top gear at a slow speed you get to that last 1/8th throttle and it lays over(fat).

It feels bad enough that I don't feel that dropping the needle one groove will have enough impact, I am steering toward going with a 172.5 main and leaving the needle where it is.

Thoughts?

 

[Jinx_pt]

Bike year & model ='19
Temperature (degF) =53
Elevation (feet) =900
Main jet =175
Pilot jet =42
Needle & notch =NECW
Air screw setting =1 1/2
Throttle valve/slide =Standard(I didn't look )


It feels bad enough that I don't feel that dropping the needle one groove will have enough impact, I am steering toward going with a 172.5 main and leaving the needle where it is.

Thoughts?

Hello Rodent!
Yes the stock needle is baaaaad!!

This is my opinion, base on what i have learn in this forum and testing on my bike.
Always keep an eye on the spark plug color to see whats going on with the engine!!

What notch, 3???
Going with the 172 MJ is a good idea. Try that and see how it feels...
If your not happy after that, you can lower the needle one notch.
My setting is similar, but with a 2013 gasgas.

 

[rodent]

Hello Rodent!
Yes the stock needle is baaaaad!!

This is my opinion, base on what i have learn in this forum and testing on my bike.
Always keep an eye on the spark plug color to see whats going on with the engine!!

What notch, 3???
Going with the 172 MJ is a good idea. Try that and see how it feels...
If your not happy after that, you can lower the needle one notch.
My setting is similar, but with a 2013 gasgas.

Yeah it's in the 3rd groove, I'll leave it where it is and throw the 172 jet in and see how I get on........hopefully get out this weekend for a test run

I don't mind if it's a bit fat, but I'd rather not be going through plugs flatout

Thanks for the reply

 

[Davehuge]

Hi Rodent... Just wanted to check... you're using fully synthetic oil at 50:1 / 2% ?