Jetting Database - PLEASE ADD YOUR SETTINGS

[Gasser Nate]

Pretty much that same mate when I checked it when doing the jetting initially, I only ever change it when I do a top end and never really look at it until then.
I only need to change the pilot to a 42 and tweak the air screw in winter.

 

[Gez]

Good to know, I have a 42 here but found it abit blubbery when I tried it last year during winter. It's there if I need it though

 

[(F5)]

Forget jetting by plug colour. It's a road race tool that only tells you main jet and only if done under controlled test. Just pulling the plug out and looking at it is only going to tell you something might need changing, maybe. Or that it looks like you should change it. Or that it should be in the bike for it to run.

 

[ricar116]

N1EF and #7 slide in 2nd clip too rich for my riding style in hilly tight rocky Missouri. I could foul plugs easily off idle when cold.
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Bike year & model = 2018 XC300
Temperature (degF) =55F 13C
Elevation (feet) =960
Main jet = 175 (stock)
Pilot jet =42 (stock)
Needle & notch =N1EG 2nd
Air screw setting =1 5/8 out
Throttle valve/slide = #8

Results: Using Motorex Cross Power 40:1 95 octane unleaded. No plug fouling very predictable linear power no dips no hits. Great idle easy start. Curious to see how she works at 100F 38C hope to stay with a "G" needle. I love this bike!
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[hannesd]

2015 ec200
sealevel 5-15 Celcius
AS1 screw top cap carb
squish untouched, will get into it when i change the piston.

MJ 175
PJ 42
needle CDM #3

this setting gives a nice midrange and ok top.

previous setting (when i bought it) it came with following setting:

MJ 172
PJ 45
needle CDM #2

this gave a tiny bit better really down low but was flat up top.
there was quite some spooge with this setting.

 

[JoseGas25]

Hello, some of you have try the NECW needle?
Here in Spain it is very famous. I have a 48, 172 and NECW and the bike is very very smooth and progressive in the low rpm.
Sorry for my english, I am Spanish hahhaha

 

[SpirosZ1000]

Smartcarb to last bike (2015 ec300)
Transferred it to current 2018 250 GP
Problems SOLVED
(But now I don't have anything to change every now and then on the bike)

 

[Doc Brown]

Hello, some of you have try the NECW needle?
Here in Spain it is very famous. I have a 48, 172 and NECW and the bike is very very smooth and progressive in the low rpm.
Sorry for my english, I am Spanish hahhaha

Jose, what bike and year? 250? 300? You run a 48 pilot? Which clip position (from top) is the NECW?

 

[Gez]

Rode the bike again this weekend just gone, this time in the bush. Same jetting as the mx track. Bike felt strong everywhere, PV adjustment worked really well for the bush.

Did a quick fuel drain out to see what consumption was like. Did 49.5km and consumed 4.5l of fuel, absolutely stoked with this consumption. It means 100km loops are possible if needs be.

Riding again this weekend, hopefully I'll do another fuel consumption test and see where I'm at.

2018 EC300
MJ: 175
PJ: 40
AS: 1.5
NEDW: #2

 

[Doc Brown]

Rode the bike again this weekend just gone, this time in the bush. Same jetting as the mx track. Bike felt strong everywhere, PV adjustment worked really well for the bush.

Did a quick fuel drain out to see what consumption was like. Did 49.5km and consumed 4.5l of fuel, absolutely stoked with this consumption. It means 100km loops are possible if needs be.

Riding again this weekend, hopefully I'll do another fuel consumption test and see where I'm at.

2018 EC300
MJ: 175
PJ: 40
AS: 1.5
NEDW: #2

First ride 2020 yesterday. I jetted the bike exactly the same as my previous bike (300 EC 2019) and the fuel consumption is far too high.

I wonder why the fu*k I can get all my mates bikes right just struggle with me own one. Bloody hell!

20? C, 300 EC 2019

MJ: 180
PJ: 42
AS: 2
JD-RED: #3

Consumption was 3,75 liters for 29,7km in easy terrain, but only gears 1 to 3.
That's too high. My previous bike at the same track with same jetting would have used 2,75 liters.

Yes, my float height is right and the bike didn't spill any fuel, I also have the overflow hose looped acc. JD's recommendation...

I wonder if the smaller PJ 40 would help but fear to get the bloody lean hang after steep climbs

 

[Gez]

Ok, just back from another ride today. Chased my tail on the PJ. I had a strange high idle in neutral once warmed up, I used the airscrew to knock the rpm down to a more reasonable level. Once this was done the bike had no lug or guts down low. I'm guessing I need to move up to a 42PJ to cure this.
Let me know your thoughts.

 

[Jakobi]

Ok, just back from another ride today. Chased my tail on the PJ. I had a strange high idle in neutral once warmed up, I used the airscrew to knock the rpm down to a more reasonable level. Once this was done the bike had no lug or guts down low. I'm guessing I need to move up to a 42PJ to cure this.
Let me know your thoughts.

How cold is it Gez.. A half clip richer on the needle could help too.

 

[Gez]

15 degrees down here.
I've got 3 days of sand riding up in the desert next weekend. I'm thinking the extra fuel couldn't hurt

 

[JesseeS]

Just wanted to add to the database. Found a lot of things up on my bike that could have made my jetting the way it was. When I received the bike the jetting was 175 45 CEK 2nd clip. Wasn’t running quite right. Checked the reeds and one had a crack, and also they PO installed the cage in offset so 1/3 of the intake was blocked. Once fixed I couldn’t even get the bike to start. Kept the 175 main swapped to a 42 and NEDJ 3rd clip. Bike started after multiple attempts. Ran it down the road and it crackled and sputtered everywhere, main running lean.
As it sits
Sea level
70F
NEDJ 2nd clip
175 main
42 pilot
AS 2.5 turns out

I just purchased a 180 main, and a 40 pilot. Going to install those and see how she runs and adjust the clip accordingly

 

[Doc Brown]

What bike?

 

[JesseeS]

What bike?

2011 EC300 six days After reading a lot of the info out there I?m going to double and then triple check my float height. I faintly recall setting it at 18 and read it should be between 14-16. Going to check

 

[Jakobi]

2011 EC300 six days After reading a lot of the info out there I?m going to double and then triple check my float height. I faintly recall setting it at 18 and read it should be between 14-16. Going to check

If it's a 2011 with the ASII carb with the flat cap mounted by 2 M5 bolts (not the round screw on carb cap), then the float level should be 6.5-7mm

The 16mm height is from the older carbs that had deeper bowls. See the sticky in this section.

 

[JesseeS]

If it's a 2011 with the ASII carb with the flat cap mounted by 2 M5 bolts (not the round screw on carb cap), then the float level should be 6.5-7mm

The 16mm height is from the older carbs that had deeper bowls. See the sticky in this section.

I have the screw type cap ASI

 

[Gez]

2 degrees this morning. Warmed up to 13 degrees.

42 PJ
175 Main
AS 2.0 out

Big change from 42PJ 1.5 turns out. Snappy, idles like a dream even from cold. Even didn't spooge much, mostly tech single and 2 track.Happy for this to be my winter go to now. I'll just change to a 40PJ in summer if needed.

 

[Doc Brown]

New favourite setting!

GasGas EC 300 - 2019

Main jet: 172
Pilot jet: 40
Needle: NECH
Clip position: 3 from top
airscrew: 1.75 turns out from seated
Gas: 100 octane premium gas
Mix: 50:1 Fuchs Titan S100 Racing Oil
Altitude: 600 to 800 feet
@ 70 F
GP cylinder head
stock exhaust
9mm float height