Jetting Database - PLEASE ADD YOUR SETTINGS

[FastFast]

2013 300XC

+/-5000ft elevation.
40 Pilot.
NEDW on the 3rd clip.
165 Main.
Air screw is 2.5 turns out.
Float Height 8.0mm
50:1 with Opti2 and 93 Octane.

Typically start and end my day in 2nd gear. All my riding is rocky single track switchbacks, hard packed trails, lots of roots and technical riding rather than speed. I've found the changes made to the jetting have really reduced the engine loading up with oil, the bike starts great, warms up in reasonable time, doesn't splooge at all, throttle response is linear and the hit has really been mellowed out. Best for me is with this jetting I have no need to keep tweaking the settings. Within reason, regardless of temperature, elevation, or humidity in my riding area I find these settings to cover all my requirements. Ride and go.

 

[hamilton]

12 250

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Bike year & model = 12 xc250
Temperature (degF) = 60F
Elevation (feet) = sea level
Main jet = 178
Pilot jet = 42
Needle & notch = JD blue needle clip#3
Air screw setting = 1 1/4 out
Throttle valve/slide = 6.5 slide

Results: Carb AS 1 38mm, 40-1 pre-mix, engine mods, FMF gnarly pipe and check point power valve cover.
This setting has taken me a while, think I've tried about every suggested needle on this site. Needed to change slide to get the results I wanted. Nice smooth,strong power from bottom to top.
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[Simmo737]

Bike year & model = 15 300r estart
Carb=AS1 (screw top)
Temperature (degF) = 15-30c
Elevation (feet) = sea level to 1000'
Main jet = 175
Pilot jet = 42
Needle & notch = N3CJ clip#3
Air screw setting = 2 1/2 out
Throttle valve/slide = 7
Float height=16.5mm

As delivered (dealer jetting, not GG). Blubbery but nice to ride and rips from 1/8th up, very tractable but 8.1Km per Litre, did better in sand due to on the needle the whole time. Also lost my breather hose half way and tipped it over on hills a couple of times, so float level and tank loss would not have helped.

 

[Simmo737]

Bike year & model = 15 300r estart
Carb=AS1 (screw top)
Temperature (degF) = 15-30c
Elevation (feet) = sea level to 1000'
Main jet = 175
Pilot jet = 40
Needle & notch = N3CJ clip#3
Air screw setting = 1 1/2 out
Throttle valve/slide = 7
Float height=18mm

Blubber gone, slightest hint on crack of throttle, much better response, whole rev range crisper. Will evaluate on proper ride soon re range.

 

[n_green]

Bike year & model = 2014 EC300R E-start

Carb: 38mm PWK ASII carb

Engine: Modified head running 1.3mm squish, 1 x .5mm base gasket. CR unknown, slightly higher then stock - approx 12.5:1.

Temperature (degC) = 25 - 30 degC

50% humidity

Elevation (feet) = 300m.

Main jet = 178

Pilot jet = 40

Leak jet = 85

Needle & notch = N3CJ #3

Air screw setting = 1.4 turns out

Throttle valve/slide = 7 non-notched

Results:
Good strong idle, wicking the throttle response wis close to perfect. There is so much more torque with this jetting, I was lugging it up hills in second that the NEDJ needle would have required first gear for. Whilst there is a slight blubber under load its not too bad and doesn't load up too much. The top end is so much better using the N3 needle, from low revs in 4th gear it rolls on smooth and predictable before exploding into an awesome top end. There is a bit of a lull before it comes onto the pipe, I have a feeling half a clip leaner would do the trick, will experiment another time.
Fuel use was 4.5l for 58k's = 12.8k's per Litre.

http://youtu.be/nsFQfvtA12s

 

[jpgibson]

Bike year & model = 2013 EC 300R with e start
Temperature (degF) =26C = 80 oddF
Elevation (feet) =less than 500ft
Main jet = 175
Pilot jet =40
Needle & notch =N3CJ #3
Air screw setting =1.5
Throttle valve/slide =standard ( 7 i think)

Results:no bloody good!
Bike was running OK, with the 0-1/8 splutter.With the 40PJ I could NOT get it to idle at all.I had this problem with my 2010 too.I put the 42 back in-> all good.
Looks like I'll have to accept the slightly annoying splutter/burble and never touch it again!
So, what works is:
Bike year & model = 2013 GG EC 300R with e start
Temperature (degF) =80
Elevation (feet) =500
Main jet = 175
Pilot jet =42
Needle & notch =N3CJ#3
Air screw setting =1.5
Throttle valve/slide =7

Results:back to its normal self.End of quest.
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[jpgibson]

hold on a minute gibbo...quest not over!
Bike year & model = 2013 300 EC Race/E
Temperature (degF) =86
Elevation (feet) =300
Main jet = 175
Pilot jet =40
Needle & notch =NECW#3
Air screw setting =1.5
Throttle valve/slide =7

Results:Was only around the block a few times, but...Started( no choke, but then it is 30 oddC), instantly and settled into an idle immediately.Warmed bike up and blatted around the streets. Still a bit of burble off the bottom BUT seemed smoother and had a pretty decent hit up top.
Why an NECW? Cos I've got one of them- the others being N3EG x2, N3CJ, NECW,N1EG and I thought ( well, after reading n_green, jakobi's posts) if I go richer on the straight section , I'd better lean the PJ ( which is not what I did the other day-N3CJ and swapped a 42 for a 40-no good).
Hopefully take it for a ride in next couple of days.

Edit: went for a ride today: 20 C , pouring with rain.NECW#3,40 PJ, AS 1.5, main 175. Started, idled and lugged great. The , after a couple of hours, the idle started to hand.Fiddled with AS ( turned it in a bit), settled.
Got home and cleaned her, thought I might lower the needle and when I took the slide out, it was a bit 'stuck'- white greasy stuff on the back of it.mmmm.Had a look at the airfilter, was a bit wet.So I think I may have taken a bit of water on board!All cleaned out, new filter. Also had a look at the plug, it was dry but black ( mostly).Not surprising as I tootled around most of the time, dont even think I got on the pipe!
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[jpgibson]

Bike year & model = 2013 300R/E
Temperature (degF) =70
Elevation (feet) =200
Main jet = 175
Pilot jet =42
Needle & notch =NECW #2
Air screw setting =1.5
Throttle valve:7

Results:Changed the PJ to a 42 as I was 1 or thereabouts turns out on the AS.Idle kept hanging with the 40.Put in the 42 and it needed a bit more out on the AS and was a bit rich.So, I dropped the needle to #2 ( from 3).
Admittedly I only rode round the block a few times ( sorry Stanmore-ians) but it felt good.Very smooth.
Oh JG's top tip: if you havent got a air compressor, a bike pump with a presta valve attachment is perfect for blowing air through the PJ!

 

[Simmo737]

Bike year & model = 15 300r estart
Carb=AS1 (screw top)
Temperature = 15-30c
Elevation (feet) = sea level to 1000'
Main jet = 175
Pilot jet = 38
Needle & notch = N3CJ clip#2
Air screw setting = 1 1/2 out
Throttle valve/slide = 7
Float height=18mm
Power Valve=stock
Maxima 927 40:1

This jetting is unreal. You could probably just squeeze a 35 in but you'd lose the torque. Now to adjust the pipe hit with the pv.

 

[BSM2]

What does mean "Throttle valve/slide = 7" ??

 

[Simmo737]

What does mean "Throttle valve/slide = 7" ??

The slide is what's pulled by the throttle and opens the airway in the carb body, it has a cutaway on the bottom in a crescent shape to allow airflow for idle, I believe the 7 is for 7 mm.

This is a golden explanation of what carby part affects what throttle opening:

http://www.keihincarbs.com/tips/gate.html

 

[Simmo737]

Bike year & model = 15 300r estart
Carb=AS1 (screw top)
Temperature = 15-30c
Elevation (feet) = sea level to 1000'
Main jet = 175
Pilot jet = 40
Needle & notch = N3CJ clip#2
Air screw setting = 1 Out
Throttle valve/slide = 7
Float height=18mm
Power Valve=2.2
Motul 800 57:1

I thought the last jetting was great but just needed to adjust the PV, WELL, when adjusting the PV it was obviously too lean, and the 40pj makes this the best gasgas power by a mile I've had, the bike will not stall, is torquey, revs absolutely linear and has a supersonic top end.
In flowing single I switch to the soft map, rocks and slow tech and fast open stuff dry map.
The fuel economy seems to be better as well.
The ignition maps seem to be different. The 13 was snappy off the bottom in dry and soft of the crack with the same top end in wet. The 15 is now soft all the way through in wet mode. Dry mode is now smoother off the bottom but more torque is there and the mid and top end is mind blowing!!

 

[Simmo737]

Further to above, my previous bikes with the old head ran equally well on 98/95/91 fuel. The new motor runs much better on 95 compared to 91 (haven't tried 98). Also the new one runs better on GRO FULL SYNTH or Motul 800 than on maxima 927 where as the old head liked castor. Go figure.

 

[benj565]

Bike year & model = 15 300r estart
Carb=AS1 (screw top)
Temperature = 15-30c
Elevation (feet) = sea level to 1000'
Main jet = 175
Pilot jet = 40
Needle & notch = N3CJ clip#2
Air screw setting = 1 Out
Throttle valve/slide = 7
Float height=18mm
Power Valve=2.2
Motul 800 57:1

I'm running the same as your setup (except for a richer main jet, 178) but in a 250 with an AS2. Strange how there's bugger all difference between the 250 and 300 jetting wise, and that the 250s seem to want a bigger main.

 

[Simmo737]

True! Must be the vf4, if I go leaner it's too lean.

 

[Simmo737]

Hey benji, is it your fantic? It may have the old barrel and head, they jet a little bit different. Cheers.

 

[benj565]

Hey benji, is it your fantic? It may have the old barrel and head, they jet a little bit different. Cheers.

Yeah, its a 2013, but from what ive figured out, its the same as a 2011 six days, etc. motor. 38mm AS2. from what ive heard, the AS1 and AS2 jet abit differently, and the 250s require a little bit more fuel.

great motor, just seems a bit finicky jetting wise compared to what ive had previously (yz250, ktm 250sx, kx250, cr250)

 

[Upyourkiltbatman]

2011 xc 300
Sea level
Uk temperature
Pilot 40
Main 180
Ne3g needle
2 clip down
Bike runs great, crisp off the bottom and fairly smooth , just wondering why no one else has this set up , little bit of Rev on after a full blast section and no spooge , hope this is ok

 

[jpgibson]

N3EG popular needle in OZ. i found it too fat and like N3CJ and now the NECW.

 

[CampX]

2005 EC300
175 main, 40 pilot
2500-5000 ft ASL
NEDW #3 clip
Stock pipe and silencer (custom bent, lol!)

Temperatures are crankin hot in southern BC right now, and my bike was running a lot rich this weekend. (30 degrees C up at 6500 feet!)
I had ordered a NEDW awhile back, but was too busy/lazy to put it in. The needle that came with the bike has no markings, brass coloured. Threw in the NEDW last night, and bam, cleaned it up nicely. Still a little hesitation down low, but seems to pull harder, and longer, than the original. Some bush riding will tell the tale better.