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


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Old 01-28-2024, 12:38 PM
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Default Jetting seem right?

After pulling my SC and putting the Keihin back on I decided I would check jetting on the carb. I never checked it since I bought the bike and it is running great as far as I am concerned. Does this combo seem right? I have checked the database and cannot really find anyone running the same. I ride between 600-2500? elevation.

2011 ec250
164
38
CGJ needle 2nd clip

I had to get the old magnifying glass out to read the needle, but I?m pretty sure that?s what it said. Like I said, it runs good, minimal spooge if any. If anything it would be nice to have a little more snap on the bottom.


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Old 01-28-2024, 10:20 PM
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Default Jetting Database Thread

Go to the jetting data base thread and start at page 11. Everyone has their jetting specs listed there. It has anything and everything right there. Its a wonderful resource.
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Old 01-29-2024, 10:17 AM
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I?ve browsed through the database and the jetting 101. I couldn?t find anyone with the 164 main or a listing of the needle I have. I?m still learning the jetting stuff. It runs good so I don?t want to mess with a good thing, just curious on the numbers.
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Old 01-29-2024, 02:01 PM
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Just curious - where are your idle mixture screw and your idle screw adjustment set? How many turns out for each one?

jeff
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Old 01-29-2024, 02:24 PM
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I will double check when I get home. If memory serves me though, I believe the AS is around 1.5. Idle is perfect at 1250rpms all day. I?ll chime back in later when I get off work.
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Old 01-29-2024, 04:23 PM
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AS 1-1/8
Idle 7 3/4
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Old 01-30-2024, 06:00 PM
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Plot thickens boys. Had some spare time to really take a look at this carb and settings. I?ll post this on the database thread as well just to document.

Keihin 36mm (36 cast on cap)
165 Main
38 Pilot
CGJ needle 2nd position with shim( didn?t notice that the first time I pulled it)
Slide stamped 65
AS 1-1/8
Idle 7-3/4
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Old 01-31-2024, 06:45 PM
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Anyone? Seem overly lean? I have no clue on how to interpret the needles.
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