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


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  #1  
Old 08-21-2016, 02:48 PM
Stefan Baele Stefan Baele is offline
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Default Help.. Jetting problem?

Bike year & model = 2001 enduro ec300 (2stroke)
Temperature Celsius = 0 - 30
Elevation =0-1000meter
Main jet = 182
Pilot jet =40
Needle & notch =n1EF notch = clip on highest point( needle lowest)
Air screw setting =2,5
Throttle valve/slide =7

results: from 0% to 40 % trottle the engine responds well .
if i go from 20a30 % trottle to WOT the rpms goes up but... it takes a 2 or 3 seconde to reach max rpms !it s like i should pull THE chocke a little bit up when i open THE trottle
when i close the trottle then and open it again right away,then it works Great,straith to max rpms.if i let HIM idle for 15 Seconds i got THE same problem again..
i gues he is to rich ???
Sombody Any suggestions for my what i should change first?
Pilot jet ?
I tryed THE needle clip 1 groove down but That is even worse
The owner before me did trial tracks with this bike..

Thanx and sorry for my bad englisch.
From Belgium
Stefan


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  #2  
Old 08-23-2016, 10:57 AM
GGRider01 GGRider01 is offline
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If you raised the needle and it got worse, that suggests a rich condition. First, I would try a 178 or 180. Not a huge change, but little steps.
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Old 08-23-2016, 02:00 PM
Stefan Baele Stefan Baele is offline
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Yes, he was to rich! :-)
I changed the pilot jet from 40 to 35 and also changed THE main jet from 182 to 165
I got THE main jet laying around... Now he Goes fine. No more problem when riding slow and open THE trottle full , he shoot to max rpm without Any problem and fast.
Now its a task to find THE biggest main jet he could run..without THE problem return

If i try THE main jet of 182 i got THE issue again but just a little bit..
I Will try a 175 main jet?
Will iT make a big diffirence from 165 to 175 main ?becouse he is driving smooth now...but i wanna be sure i gotTHE best jet...

Thanx for your advise ggrider
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  #4  
Old 08-25-2016, 05:01 PM
GGRider01 GGRider01 is offline
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Ok, those are not little steps!

Try a 175. Buy a 178 if you can. I'm positive the 165 is going to be too lean. Don't use it for very long, or don't ride hard if you do.

Then try a N3EG needle! The likely reason you felt the need to go to a 35 on the pilot is because the needle is too rich.. The straight section of the needle (denoted by the last letter, F, G, H, W, etc) plays a significant part in the idle circuit. The stock N1EF is too rich all around.

I would not recommend the 35 pilot. It might respond really crisp but will generate excess heat and not have as much power. I am currently running a 42 pilot and 175 main. Currently testing a N3EG at the behest of another user here.
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  #5  
Old 08-25-2016, 05:23 PM
adriano.ro adriano.ro is offline
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42 with n3eg is a bit too rich, I use 42 but only with n3cg and 178 main.
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  #6  
Old 08-26-2016, 11:38 AM
Stefan Baele Stefan Baele is offline
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Thank you for the good info.
I Will change the needle asap.
And hope it will fix my problem.
And i Will change THE pilot back to 40

A 175 main is in the carb now and a 35 pilot And he is stil a little to rich at WOT

Cu later

Last edited by Stefan Baele; 08-26-2016 at 01:34 PM.
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  #7  
Old 08-26-2016, 01:46 PM
Stefan Baele Stefan Baele is offline
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Default Reed valv problem ....

Hello , I checkt my reed valv and 3 from 4 valves are a little bit open...
0.15mm = gap of 0.0039 ″

Is it possible to turn THE reed valvs(carbon piece) upside down?
Should i try that or buy a new ?
http://cdn1.motocrosscenter.com/shop...-300-97-05.jpg
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  #8  
Old 08-26-2016, 01:52 PM
Stefan Baele Stefan Baele is offline
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Default Reed valv problem

These reed valvs are in my ec 300 right now:


http://cdn1.motocrosscenter.com/shop...-300-97-05.jpg

The site recommends both reed valvs for ec 300 from 2001 - 2 stroke
...
I buy these becouse these are THE same as mine
Or can i turn them upside down to handle the problem?
Thanx for advise
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