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Enduro Intake/Carburetion - 2 stroke Jetting, Reeds, Air Filters, etc. |
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#1
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Another Jetting Question
I recently changed out my needle from a CEK to a N3EG and I noticed that I have studder in the upper mid-range under hard acceleration. I pulled the plug and looks to be running a little rich. No real issue at low RPMs
Do you think that I need to raise the clip? Here is what I got Temp 45 degree F Low humidity elevation 500 - 1000 ft Fuel 50:1 syn Slide #7 Needle N3EG Clip 3rd Main 178 Pilot 42 Air Screw 1 1\4 turns out Thanks in advance for your advice
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Marc Haught 2008 EC 300 Racing |
#2
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What sized main and pilot did you have with the CEK? What clip position was the needle in? How did it run?
N3EG#2 will supply roughly the same amount of fuel as CEK#3 from 3/8 throttle to WOT both using the same sized main (according to JD jetting spreadsheet). If a fully clip position leans it off too far you could also try a N3CG#3 which is half a clip leaner. |
#3
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Everything is the same as it was minus me changing the needle. I went out earlier and moved the clip however I get the same stud-er at about half throttle.
I will try installing the old clip and see if I get the same results
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Marc Haught 2008 EC 300 Racing |
#4
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I cleaned up the carb again and put the CEK needle back. Double checked the float. I fired it up and its not studdering mid throttle. I plan on putting the N3EG back tomorrow and see if the symptom returns
Current set up Slide #7 Needle CEK Clip 3rd Main 178 Pilot 42 Air Screw 1 3/4 turns out
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Marc Haught 2008 EC 300 Racing |
#5
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Try the N3EG#2 and see how she feels.
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#6
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put in the n3eg on the second clip on the stand it is running clean. I will take it out to the track this weekend.
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Marc Haught 2008 EC 300 Racing |
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