Jetting Database - PLEASE ADD YOUR SETTINGS

[Doc Brown]

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 )

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 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?

I have almost the same set up on my EC300/19. Just that I use a 178 main jet with JD's red needle. As I have bought an NECW needle because I was told it feels as crisp down low as the JD I would like to know what you think about that needle from mid to top?
I never tried it as I was happy with the JD needle but I would like a more linear power curve with less hit...

 

[rodent]

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

Motul 710 50:1

I have almost the same set up on my EC300/19. Just that I use a 178 main jet with JD's red needle. As I have bought an NECW needle because I was told it feels as crisp down low as the JD I would like to know what you think about that needle from mid to top?
I never tried it as I was happy with the JD needle but I would like a more linear power curve with less hit...

I'm going to change out to a 172 main to see if that cleans up the top end, if it leans too much I'll put the 175 back in and just drop the needle a notch and see what happens. I'll let you know.

 

[Pygmygod]

I'm currently running the following in my 2007 EC200:

Bike year & model = 2007 EC200
Temperature (degF) = 50-86
Elevation (feet) = 1300-2000
Main jet = 178
Pilot jet = 48
Needle & notch = NDHW Clip 2
Air screw setting = 1.25
Throttle valve/slide = 6

Haven't tested it yet but the 50 pilot that was in it was too rich.

 

[Doc Brown]

I'm going to change out to a 172 main to see if that cleans up the top end, if it leans too much I'll put the 175 back in and just drop the needle a notch and see what happens. I'll let you know.

That would be great. Thank you!

 

[Jim Cook]

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?

The needle position won't matter when you are at Wide Open Throttle. That's strictly main jet territory; well, that and air flow through the filter.

Good luck and let us know how it goes with the smaller main jet.

 

[rodent]

Jim, I have no doubt that you are correct

However, when I changed from the N1EF to the NECW there was definitely a noticeable difference at wide open between the two(the NECW was much better).

I do hope to get out this weekend to see how the 172 main performs

 

[rodent]

That would be great. Thank you!

Went out again today for 4 1/2 hours/120km with the 172main jet, it's still blubbery when you roll on to wot but overall feels better

Man I love this machine, I've only been out on it 3 times and I'm getting the vibe that the bike knows me better than I know myself...it's very forgiving

I haven't pulled the plug yet(it didn't foul a plug today), but I'll pull it tomorrow and if it's black I'll most probably go with a 170 main and try again.




Pulled plug and it's still darker than I'd like........going down to a 170.

 

[Jim Cook]

Went out again today for 4 1/2 hours/120km with the 172main jet, it's still blubbery when you roll on to wot but overall feels better

Man I love this machine, I've only been out on it 3 times and I'm getting the vibe that the bike knows me better than I know myself...it's very forgiving

I haven't pulled the plug yet(it didn't foul a plug today), but I'll pull it tomorrow and if it's black I'll most probably go with a 170 main and try again.

Pulled plug and it's still darker than I'd like........going down to a 170.

If it is blubbery as you transition to upper revs from down low, I'd try moving the clip one groove higher, before going to a 170 main jet; just to make sure what's going on.
One more thing.... If your exhaust packing is already full of spooge, it can affect your jetting results.

 

[rodent]

If it is blubbery as you transition to upper revs from down low, I'd try moving the clip one groove higher, before going to a 170 main jet; just to make sure what's going on.
One more thing.... If your exhaust packing is already full of spooge, it can affect your jetting results.

It's only "blubbery" at wot, not before, getting there is great

I would hope the packing isn't soaked in spooge as I've only been out 3 times

 

[rodent]

Gonna try the below settings this coming Saturday(31st). Dropping down from a 172 main and a 42 pilot.

Bike year & model ='19
Temperature (degF) =53
Elevation (feet) =900
Main jet =170
Pilot jet =40
Needle & notch =NECW/3rd
Air screw setting =1 1/2
Throttle valve/slide =Standard(I didn't look )

 

[rodent]

Went out yesterday with the above settings, spooge is only running halfway down the muffler now. It's definitely cleaned up but still dies at the peak, gonna go down to a 168 and might lower the needle one groove.

 

[rodent]

^^^^If the above has no impact I'm considering taking it back to the dealer for them to take a look at. Even with the 170 main in it I doubt that it should be dying/no power at wot.

I will have only been out on it 5 times at that stage, are dealers usually receptive to taking a look at it gratis or should I prepare for the worst??

 

[Doc Brown]

^^^^If the above has no impact I'm considering taking it back to the dealer for them to take a look at. Even with the 170 main in it I doubt that it should be dying/no power at wot.

I will have only been out on it 5 times at that stage, are dealers usually receptive to taking a look at it gratis or should I prepare for the worst??

Thank you for reporting back. I will probably try exactly your set up on a friends bike. He already changed the 175 with which the bike came to a 172 but with a 42 pilot. We ride at 200 meters (about 660 feet) and temperature is currently only 15 to 18 C (60 to 65F). I guess that should work well as he almost never rides WOT and has a lot of spooge. When it was warmer his bike sounded very rich from down low to top with the standard N1EF.

 

[derbimarcel]

Ec300 Replica 2013 ?supermotard?
Sealevel 0-30?C ~80% humidaty
178/42 NEDH #3
Air +-2
Bit rich in summer under 1/4 throttle.
Caramel brown spark en power everywhere.
110kms hitting reserve
Top speed: 147km/u 13-40 gear

 

[Mikeyx]

- EC300, m.y. 2009
- altitude: 100 m above sea level
- riding temp: 3...20 C

- main: 175
- pilot: 40
- needle: E3CJ, clip at highest notch

Feels like a different bike after N1EH needle. Wheelies in 2nd gear...
Thanks to jakobi & F5 for advice.

 

[distortion10]

Hello all,

Just finished a great single track ride but I still have some jetting work to do. Here is what I ran today. Please let me know what you think?

Bike year & model = 2018 EC250 (stock except for turbine 2 w/ spark screen)
Temperature (degF) =65 to 80
Elevation (feet) = 1300 to 1500 feet
Main jet =175
Pilot jet =42
Needle & notch =NEDW 3rd from top
Air screw setting =1.5
Throttle valve/slide =stock

Results: Everything felt great at 65 degrees. Had a momentary off idle bog as the day get warmer but it was only noticeable when at idle then whacking the throttle. Never noticed while under load. Tried everything from 3 out to 1/2 in on the air screw but it nothing eliminated the bog. Seemed to have better throttle response at 1.5 to 1 in.

Any recommendation for where I should start? I was thinking about dropping the clip one slot first as I don't have a larger pilot at the moment. Thank you in advance for any advise.

 

[rodent]

Not sure if this has been posted or is any help to you folk in Oz or NZ, maybe helpful to others that are in a similar situation as us.

 

[Gez]

Tried some new jetting at the MX track yesterday.
2018 EC300
MJ: 175
PJ: 40
AS: 1.5
NEDW: #2

Temp range: 20c -30c

Air screw started at 2.25 but it kept backing out during the day so I'm not 100% on its position. Anyway, best I've seen my plug looking since I bought the bike.

 

[Gasser Nate]

Tried some new jetting at the MX track yesterday.
2018 EC300
MJ: 175
PJ: 40
AS: 1.5
NEDW: #2

Temp range: 20c -30c

Air screw started at 2.25 but it kept backing out during the day so I'm not 100% on its position. Anyway, best I've seen my plug looking since I bought the bike.

Almost identical to me, except I run a 172 main.

 

[Gez]

How's your plug look Nate?

I'd like to compare this result to riding bush where I tend to use the bottom 50% of the throttle as opposed to the top 75% on the track.