Jetting Database - PLEASE ADD YOUR SETTINGS

[gasgallo]

Bike year & model = 2004 EC300
Temperature (degC) = 5°C-13°C
Elevation (meters) = 200 m
Main jet = 170
Pilot jet = 40
Needle & notch = N1EF first from above
Air screw setting = 1.5 from close
Throttle valve/slide = #7

Results:
nice in almost all situations. ready and powerfull.

[stainlesscycle]

updated 5/17/10
Bike year & model = 2000 xc200
Temperature (degF) = 70
Elevation (feet) = 1000-2000
Main jet = 172
Pilot jet = 48
Needle & notch = DDK (2)
Air screw setting = 1.75 turns

bike rips.

richer pilot helped bottom end. harder to keep idling, but runs much stronger with instant power delivery.

[clw]

Bike year & model = 2001 XC300
Temperature (degF) = 65°F
Elevation (feet) = 20
Main jet = 178
Pilot jet = 45
Needle & notch = JD Red in #4 (from JDK014 kit)
Air screw setting = 1.75
Throttle valve/slide = 7

Results:This needle is a candidate for 1/2 clip settings! #3 is a little too lean with no hit resulting in soft power, bottom very clean, #4 still clean but lets the engine torque off idle and into the mid much better. With a 175 the plug will be tan and read as ideal based on color, but I prefer a step richer, hence the 178, for safety, with the 178 the plug is medium brown and dry, no spooge. Premix 43:1 either BelRay H1R or one of the Amsoil near twins(Dominator or Interceptor) & Shell 93 pump. Anyway, this setup is the best so far after 8 years of ownership. Smooth and progressive power, can even bump up the idle screw and it will idle if needed.

[SideshowBob]

Originally Posted by SideshowBob

Current Jetting-
Pilot- 42
Needle- DDK Middle Slot
Main- 180
Feels Awesome so far. Air Screw is out 2 and an 1/8 to 2 1/2.

250-1500 feet, 60-80 degrees.

Needle might need to come down one for hotter weather, not sure about that yet.

Should be noted that was a 2003 MC250 with the MC CDI and spacer for the reed cage. That should be separated off for database purposes.



This is a different engine (EC250 Racing - 2003) without the spacer and with the EC250 CDI.

50 degrees and clear
Slide #7
48 idle/pilot (2 turns out on air screw)
DDK needle top middle slot
180 main
250-1500 feet

[SideshowBob]

Originally Posted by SideshowBob

This is a different engine (EC250 Racing - 2003) without the spacer and with the EC250 CDI.

50 degrees and clear
Slide #7
48 idle/pilot (2 turns out on air screw)
DDK needle top middle slot
180 main
250-1500 feet

^^^Ended up too rich when it warmed up.

Right now-
55-65 degrees and clear
45 Pilot 2.25 turns out
DDK needle top middle slot
180 main
250-1500 feet

Still not entirely happy with the "hit", think I am gonna try this CCK if I have a few minutes this weekend.

[300XCRider]

Updated settings.

Originally Posted by 300XCRider

Updated Settings:

2009 EC 300

Ele: 0 - 1500ft ASL
Pilot: 40
Main: 180
Needle: JD Red, 3rd clip position
AS: 1 1/2 out (tested @ 70*, will have to do some fine tuning here I suspect)
Mixture: Castrol TTS @ 50:1

Removed reed block spacer.

Very little spooge and plug chops reveal a good color.

[SideshowBob]

Originally Posted by SideshowBob

Right now-
55-65 degrees and clear
45 Pilot 2.25 turns out
DDK needle top middle slot
180 main
250-1500 feet

Still not entirely happy with the "hit", think I am gonna try this CCK if I have a few minutes this weekend.

Updated settings that feel much much better. Cleaner pull from bottom to top, will need to swap to 42 pilot at some point-

Right now-
55-65 degrees and clear
45 Pilot 3 turns out
DDK needle bottom middle slot (1 rich)
180 main
250-1500 feet

[2whlrcr]

I could use some jetting assistance on my 2010 XC 300.

Bike came with:

175 main
N1EF needle clip in top position
40 pilot
air screw 2 turns out

Current conditions are:

85F
1 Million % humidity
1000ft MSL

The bike seemed to be running good down low and through the midrange, but was having trouble transitioning onto the main. I dropped down to a 172 main. This was a noticeable improvement, but still some hesitation and then it would explode onto the main. It feels like the needle might still be rich and then the main is pretty crisp. I'm reluctant to go to a 170 main, because it looks like no one has had to go that lean on a 300. I was doing most of the testing in the soft map setting, because this is where I'm going to spend most of my time. In the aggressive setting the transition seemed better, but still some hesitation.

I also received a CHN needle with the extra jets. This needle looks fatter, therefore leaner. Is this what I should be using? Anybody have any experience, or recommend a different needle?

Thanks

[2whlrcr]

Originally Posted by 2whlrcr

I could use some jetting assistance on my 2010 XC 300.

Bike came with:

175 main
N1EF needle clip in top position
40 pilot
air screw 2 turns out

Current conditions are:

85F
1 Million % humidity
1000ft MSL

The bike seemed to be running good down low and through the midrange, but was having trouble transitioning onto the main. I dropped down to a 172 main. This was a noticeable improvement, but still some hesitation and then it would explode onto the main. It feels like the needle might still be rich and then the main is pretty crisp. I'm reluctant to go to a 170 main, because it looks like no one has had to go that lean on a 300. I was doing most of the testing in the soft map setting, because this is where I'm going to spend most of my time. In the aggressive setting the transition seemed better, but still some hesitation.

I also received a CHN needle with the extra jets. This needle looks fatter, therefore leaner. Is this what I should be using? Anybody have any experience, or recommend a different needle?

Thanks

I installed a CCK needle and this cleaned it up nicely.

[twowheels]

Thanks for posting. It seems like 300s of any color are difficult to get to run clean top to bottom, and you just saved a bunch of work for a whole lot of riders.