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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc.


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  #211  
Old 05-23-2014, 08:11 PM
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liv2day liv2day is offline
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Location: Sherwood, Oregon
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Bike year & model = 2011 EC200 Six Days
Temperature (degF) = 60-80 spring/summer
Elevation (feet) = 1000-4000 ft
Main jet = 175
Pilot jet =42
Needle & notch = NEDH #2
Air screw setting = 1.25 out
Throttle valve/slide = #6

NOTE Had RB Head mod done before any jetting tests.

Results: Just finished testing a couple needles and positions and settled with this combo; with the idle screw out and the a/s set at 1.25' she pulls perfectly off idle. Transition to 1/4 through 3/4 is outstanding...silky smooth and she pulls strong. Plug looks good, though I need a good ride before telling for sure.

One interesting item of note; this is my wife's 200 and it doesn't have any spooge whatsoever. Again, it'll be interesting to see what it looks like after a ride, but my 200 drools a storm.


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  #212  
Old 06-10-2014, 07:15 PM
Flashlight Flashlight is offline
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Bike year & model = 2006 EC300
Temperature (degF) = 60-80 summer
Elevation (feet) = 2000-4000 ft
Main jet = 178
Pilot jet =42
Needle & notch = N3EG #2
Air screw setting = 1.5-1.75 out
Throttle valve/slide = unknown(appears to have been cut and the number was ground off)

NOTE RB Head mod done. 46:1 full synthetic, 94 octane pump gas. Turbine 2 core SA. Floats at 18mm.

Results:
Snap from off idle on up. No hesitation or loading up it just pulls! Tan colored plug with just a light ring of spooge around silencer. Starts and idles very nice.

Will bog with a 40 pilot and feels soft with a 175main. Loads up a bit if the clip is in the middle .
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  #213  
Old 06-16-2014, 06:51 AM
eliasn101 eliasn101 is offline
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Bike year & model = 2011 ec200 sixdays
Temperature (degF) = 50-100 winter-summer
Elevation (feet) =100 - 1000
Main jet = 178 (175 summer)
Pilot jet =45
Needle & notch = N1ED #2
Air screw setting = 2,25 out
Throttle valve/slide = -

I bought my bike with these 2 main jets as a winter-summer configuration. It is always very rich and spooze come out of the FMF.
I feel some hesitation in the lower throttle setting.
I am aware of the "issue" everyone has with this exhaust pipe but what is your opinion in my jetting?
I see that the default conf. for the 2014 models are 175-N1EF 3#-42. I'm thinking in trying this for summer conf.
What is your opinion?
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  #214  
Old 06-16-2014, 08:27 AM
n_green n_green is offline
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Location: Sydney, Australia
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Bike year & model = 2014 EC300R E-start

Carb: 38mm PWK ASII carb and reed block spacer

Engine: Modified head running 1.2mm squish, 1 x .3mm base gasket. CR unknown but higher then stock.

Temperature (degC) = 10 - 18 degC,

70% humidity

Elevation (feet) = 1100f, or 350m.

Main jet = 172

Pilot jet = 42

Leak jet = 85

Needle & notch = NEDW #2

Air screw setting = 1.5 turns out

Throttle valve/slide = 7 non-notched



Results:


Has awesome torquey power, can lug around a gear high without a problem. It's rich off the bottom and this cause a very low idle/stalling down hills along with a super annoying burble at anything below 1/8 throttle. As soon as the needle was on the taper the jetting was spot on. Super responsive and crisp with that super smooth power delivery the Suzuki needles are known for.

I was slightly concerned that by lowering the jug (went from stock .5mm base basket to .3mm) I'd lose some top end. If I did I can't tell. If anything the mid range and top end is better and stronger then ever. The bottom is also very strong, just blubbery at the moment.

Interesting is that I didn't change a single thing for this new head, the jetting is identical to what I used on the previous ride with stock head and stock port timing. On that ride which was similar temps/elevation/humidity the bottom end was close to perfect and the mid and top were spot on too. Now whilst the mid and top are still spot on (and possibly stronger) the bottom is a blubbery mess. Could this be due to the modified head burning the fuel more efficiently so it now needs less in there? Dunno next ride I'll play with the air screw and maybe even drop the pilot size down one to see.

Fuel economy was ok - 7.7l used for 74k's = just over 10l / 100ks. Pre modified head with this jetting I was getting 8l/100ks.

Edit: Swapped the NEDW#2 for NECJ#3, left the pilot and main jet the same. AS is right on 1.5 where it seems to have the best off idle response. 1.75 turns is a nicer idle and not quite as blubbery but cracking the throttle from idle results in a lean hesitation and the idle hangs for a slight amount of time just before settling again. Again once on the needle taper and main jet fuelling felt perfect. Below 1/4 though and its still a blubbering mess, its better then it was with the W dia but still needs leaning off a tad. I'll try an NEDJ#2 to see if things improve but the rich burble seems to be present all the way from 0 to just before 1/4 throttle so I doubt a half clip leaner will do too much.

Fuel use = 4.7l for 45ks = 10l / 100ks.
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Last edited by n_green; 06-22-2014 at 06:22 AM.
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  #215  
Old 06-28-2014, 07:18 AM
Selvagem Selvagem is offline
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Join Date: Aug 2012
Location: Brasil
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Bike year & model = 2008 EC250

Carb: 38mm PWK ASI

Engine: Modified head running 1.0mm squish, 1.00mm base gasket. Head volume 22ml.

Ignition Time: 1,6mm.

Temperature (degC) = 5 - 38 degC,

80% humidity

Elevation (feet) = 0 a 100M

Main jet = 175

Pilot jet = 48

Leak jet = 85

Needle & notch = NECG #3

Air screw setting = 1.0 turns out

Throttle valve/slide = 7 non-notched

OBS: Gasoline with 95 octane, 25% anhydrous alcohol. (Brasil).

Results: Idling excellent, stable. No hesitation in any scheme of acceleration, torque much better configuration already tested.
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  #216  
Old 07-10-2014, 04:45 AM
n_green n_green is offline
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Bike year & model = 2014 EC300R E-start

Carb: 38mm PWK ASII carb and reed block spacer

Engine: Modified head running 1.2mm squish, 1 x .3mm base gasket. CR unknown but higher then stock.

Temperature (degC) = 2 - 4 degC / 37 deg F

80% humidity

Elevation (feet) = 3500f, or 1100m.

Main jet = 172

Pilot jet = 42

Leak jet = 85

Needle & notch = NECJ #2

Air screw setting = 1 and 5/8 turns out

Throttle valve/slide = 7 non-notched



Results:


The pilot/diameter is correct. 1/4 turn on the air screw either way makes a noticeable difference. Where the AS is set is perfect, it has a good idle and good off idle response.

Off idle it is a tad rich and will burble away until it starts coming onto the taper. Having said that its not too bad and adds torque which allows the bike to lug up hills. The one downside to this is it makes the off idle response a bit doughy and isn't as snappy as I'd like.

Transitioning onto the taper it gets a tad buzzy (sounds like an angry swarm of bees are loose inside the expansion chamber) but I don't think its a lean symptom, more the power valve starting to open and the exhaust getting louder. From here on in its all smiles. Crack the throttle from this position in 2,3,4 gears and the front wheel will loft, no clutch required. The power continues to build smoothly but powerfully all the way to the upper end of the revs.

The ride today was 65ks of good terrain, 40k's of it was single track, 50/50 tight/flowy. There were also some techy trails like sections and hill climbs.

Fuel use = 5.6l for 65ks = 8.6l / 100ks.

Edit: I went for a ride at sea level altitudes (300m) and normal temps (10 degC) and the transition onto the taper was pretty snappy and not at all smooth like the NExx needles are known for. This is due to it being rich off the bottom and then leaning out to a nice mixture as it comes on to the taper. Fuel consumption was also up, I used about 4l for 38ks = 10.5l / 100ks.

I changed the jetting back to what it was pre-head mod and dropped a pilot, so 40p, NEDW#2, 172m, as1.5 to. Today I went for a ride to a local area 300m asl, 55% humidity, 13 degC and did 38k's most of which was a nice little test loop about 5k long. Most of the riding was tight 1st, 2nd, 3rd gear single with a small amount of faster twin trail.
Again even though it is spot on on the idle and off idle response as soon as the throttle starts opening its rich right up until it comes onto the taper at which point its perfect. The transition from rich to lean was present again and whilst not as noticeable as the NECJ#2 was its enough to indicate I have a lot of room for improvement in cleaning up the bottom.
Fuel use was 4.3l / 38ks = 11.2l / 100ks.
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2004 KTM 300 EXC

Last edited by n_green; 08-02-2014 at 07:16 AM.
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  #217  
Old 08-28-2014, 07:57 PM
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Simmo737 Simmo737 is offline
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Bike year & model = 2013 EC300R fitted with 38mm PWK ASII carb (with the new cylinder)
50 percent humidity
Elevation (feet) = 1000f, or 300m.
Main jet = 170 (previous 172)
Pilot jet = 38 (previous 40)
Needle & notch = NECJ clip 3
Air screw setting = 1.5 turns out (previous 2.5)
Throttle valve/slide = 7

Results:changed coolant, it was crap, went leaner on pilot and mj, changed to maxima 927 40:1 after much persuasion from shop owner.

Jetting is now super awesome, great everywhere and easy to start. Very happy.

Little to no spooge


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  #218  
Old 09-14-2014, 07:23 PM
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barossi73 barossi73 is offline
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Bike year & model = 2013 EC200 racing
Temperature (degC) = 0-15 winter 10-30summer
Elevation (feet) = 0-1200 ft
Main jet = 175
Pilot jet =40
Needle & notch = NOZH #2
Air screw setting = 1.75 out
Throttle valve/slide = #6

head is stock,squish?find out when i do top end(40hrs at present)1 base gasket.pwk38as2,vforce3 reeds,40:1 95octane belray h1r.settled on this after playing with nedh #2,3,4, same jets as above.may revisit nedh with larger pilot(as in liv2day post above) but this setting seems sweetest so far for mine.good idle,smooth ramp onto strong mid,good top.doesnt like constant throttle in one spot about where it gets on the pipe(a little surging)but accelerates cleanly thru so not much of an issue
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  #219  
Old 10-06-2014, 06:43 AM
Moto7man Moto7man is offline
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Bike year & model = 2011 EC 300
Temperature = 90F+
Elevation (feet) = 0-100 ft
Main jet = 178
Pilot jet =40
Needle & notch = N3EG #3
Air screw setting = 1.5 out
Throttle valve/slide = stock

Stock head. V Force,Pwk II 38mm, Motul 710 40/1. Note: dealer had installed the ultra lean CHN needle which someone else posted was the needle used for emissions testing in Europe. Much more torquey off the bottom with just a little more hit in the mid and same top end rev out. On plug chop, good tan color.
Riding condition(engine load) deep sand.
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  #220  
Old 10-17-2014, 05:52 AM
Packman Packman is offline
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Uk Sea level to 1500 ft

Stock rebuilt 04 300ec

PT Tuning Power jet
155 main
Nb 7 slide
CCK Needle
3rd clip
42 pilot
Air screw 2 turns out

(Boysten reed block & Carbon reeds)
(Flywheel weight 8oz )

Before the dyno a bit hit or miss power and pick up wise not great on fuel either there was also no snap when the throttle was opened quick. Now its totally different bike starts and idles 1st time. Now strong linier power right off idle all the way through till it tails off around 9000. No exhaust snot out the back the plug is a perfect colour even after hours of messing in the woods. Lights the rear tyre up on the road in the wet roll on in 4th and 5th

Graph is rear wheel power on a dyno jet


Last edited by Packman; 10-17-2014 at 06:42 AM.
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