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


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  #11  
Old 09-12-2011, 07:47 AM
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After doing a decent ride with the NEDW on clip 2 I feel it might be a tad lean in the mid range or quarter throttle under load. Lifting the needle (dropping the clip) 1 position appears to make the mid range feel a bit better but then I suffer a mad richness right off idle. If I try and tune this out with the AS I then get a hanging idle.. Could just be my mind playing with me. Is it normal for the bike to sound a bit tinny as it first comes onto the pipe? What exactly does a ping sound like? its really hard to determine because its the very rev range where my bike vibrates the most too so is it a ping and higher pitch I hear because of being lean or is it just the bikes pipe vibrating and resonating a bit. The power still feels strong.

I think I'll have one more play with it in the days ahead before calling it quits. Stay posted.


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Old 09-12-2011, 08:49 AM
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Please have a listen and tell me what you all think
http://www.youtube.com/watch?v=xvRWt8XubK0

The only other thing I can think of if I'm still slightly pulling over on the spilot circuit, then richening the needle clip would then richen the idle and off idle mix aswell. What I may have to do is back out the idle screw some more and ensure the circuits are separated completely. *bangs head against the wall*
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  #13  
Old 09-12-2011, 12:07 PM
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Do you have either a NECJ or a NEDJ to try? A J needle ought to work with either a 42 in warm weather or a 45 in cooler weather.

Why do you think it's lean in #2?

If you have the idle adjustment too tight the idle will hang unless you are real rich.
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Old 09-12-2011, 03:32 PM
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Only thing that makes me think I may be a tad lean in clip 2 is the sound at certain throttle. Unsure if its just the normal tinny kind of sound coming onto the pipe or not. Theres a definite area just after 1/4 throttle that sounds more tinny then the rest of the rev range but I'm not sure if its actually pinging or just some vibration.

How did the video sound on the ears?? The plug shows no sign of detonation.
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  #15  
Old 09-12-2011, 03:45 PM
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It just sounds crisp to me. Pinging normally occurs under high load conditions, cruising up that hardpack road shouldn't be a strain on the motor.

If you think it's lean in the mid, bump up the main one size and see what changes.
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Old 09-12-2011, 03:54 PM
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Good thinking. Odds are its probably just the bike making normal noise as it doesn't appear to be doing anything else odd. Its actually running really well. This is my first 2 stroke so I don't really have anything else to compare it to.
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  #17  
Old 09-12-2011, 04:04 PM
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1st 2 smoke. A smoker's power gets flat when it's too lean, they can be too lean, not ping, just be down on power.
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  #18  
Old 09-12-2011, 04:04 PM
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Jake sounds good to me mate.

Perhaps ride a few weekends and then see what you think.

You have made so many jetting changes you might be thinking too much??? Just ride bro!!!!!!
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Old 09-12-2011, 04:12 PM
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I know I'm over thinking Maybe I should leave the go pro at home for a few weeks too. Its the watching it after that causes the over analysis!

What do you mean falls flat? Won't pull through when rolling on the power? or just slower and not as strong?
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  #20  
Old 09-13-2011, 02:53 AM
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Like the motor lost its balls, weak, revvy, snapping open the throttle may result in a bog for a second

Cold start your bike, quickly turn off the choke, the way your motor acts before its warmed up is a lean condition (among other things). Just an example, not recommended as loading a cold motor can cause cold seizures.
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