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Posted

first, find out where in the throttle it is...

 

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then figure out if your lean or not and where at?

 

a CEK would be leaner in the 1/2 to 3/4 - WOT region

 

a DGK would leaner in the 1/8 to 1/2 throttle region

 

i suggest you figure out exactly where you need. it... and you could be too lean causing the stumble. needles are cheap. i'd contact carbparts.com and order those two as well as an EEK (which is richer) and test them all out. keep in mind, that as you change the EEK or CEK, it's going to affect the main jet tuning, so you'll most likely or most definitely have to adjust the main a size or two with the different needles (due to where the needle affects the fueling).

 

be patient, be persistent and pay close attention to where the problems lie in the throttle position. it will tell you.

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Posted

Ok, Played with it a little more today in the thunder and lightning. I put a 185 back in it where it should be safe and can go down from there later. I richened that needle up like u said and tried my eej and it only got worse and smoked more. I then put the dek back in it and tried all the positions and in the 1st and 2nd position (leanest) it ran the best and is now drivable. So obviously my stumble/studder was because of having way to rich of needles and that pj sucked.

 

For now should i run it in the 1st and 2nd clip of my dek needle and see where im at or should i order the next leanest needle from my dek so i can go back to the middle clip and have some room to play with for my tuning.

 

You guys have been great and thanks for the help. I'm just happy I got it running that good

 

I'm not racing it, just trail and pit riding so rich is ok for me as long as it isn't fouling plugs out. i would rather be way safe then blowing it up all the time

Posted

Never mind I lied. it seemed to run good in the driveway but as soon as I took it to my riding place it was doing the same thing. I just am really stumped with this thing. i was watching the pipes while i reved it and almost looked as if it was back firing into them it was really strange. i think I give up and I am just gonna just bring it to my friends shop before its broke. I'm capable of everything else but this is foreign language to me

Posted
Have you been trying to tune this thing sitting in your driveway? :confused:

 

Exactly, whenever you test a change, its got to be ridden under a load with the motor warm. When I check my main jet I always ride the bike around for awhile at a fast pace. Then I ride wide open in 5th gear for about 100 yards. I shut it off, and pull in the clutch and coast to a stop and pull the plug. Im looking for it to be a nice dark brown color with no wetness. Then I know that if I rode it the 100 yards and it did not hesitate, burble, bog or backfire that it is jetted ok with that plug color. When we jet the needles we ride the same little area over and over with the needle changes we make and judge what the bike does by where we go next with the change. Even setting the idle airscrew has to be done with the motor warm after its been ridden.

Posted

could running a single uni pod air filter instead of the stock air box be causing all my problems. its just getting way to much air so that no matter what needle or jetting i try as soon as it hits mid throttle and starts really needing air its just way to lean no matter what i do?

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