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archer292

2005 Suzuki LTZ 250 hanging idle

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I can't get my sons ltzs carb adjusted properly. The carb has been cleaned and re jetted as per the dynojet instructions and i still have the hanging idle. I can get the idle to come down quickly but only by lowering the idle to a point to where it won't stay running. As soon as I raise the idle to anywhere betwen 1250 and 1500 the hanging idle is back. The bike revs up fine and then just won't return to the set idle without hanging at higher rpms for a bit. Every shift is like power or speed shifting. I have tried numerous jets and adjusting the fuel screw with no luck. Any insite would be appreciated. Thanks.

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I had posted that I couldn't get rid of a hanging idle on my sons ltz 250 (with no responses I might add, tough crowd). The bike has a yoshi slip on, k&n filter with open air box, 22.5 pilot jet and 138 main jet (now). I couldn't get rid of the hanging idle with out changing the pilot jet. The bike runs great now but the only way it will idle correctly is with the fuel screw bottomed out. As soon as I try to open the fuel screw I get too far into the idle screw to keep it running and then the problems are back. The bike idles nicely around 1500, accelerates great and the plug looks to be burning perfectly. I just don't get why if I open the fuel screw letting in more fuel then why would the idle die and come back when I up the idle screw. Seems that both are adding fuel correct? I also went back to the size 20 pilot to see if i could richen it up enough to idle but couldn't get it to idle without the hanging until I put the 22.5 back in and bottomed out the fuel screw. Can someone shed some light on this???? Thanks in advance.

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im gonna look and see if i have any info on the caeb on it .. ill see what i can come up with .. but it sounds like you might have something stuck in 1 of the little passages in the carb ... i will let you know if i find the schematic(break down) of the carb an will go from there..

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Put in a dynojet kit with needle, and jets. Pulled the whole thing apart cleaned and checked for any torn rubber. The slide gasket/rubber has no tears, the small diaphram on the side was fine. I did not use anything that could break off but this is not the first time somebody was in into this thing. I called dynojet and was told it had to be a vacum leak. I checked with carb cleaner and the bike running and can not make it stumble. I also changed everything from the jug to the carb cause I wanted to start fresh sort of speak.

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you may have to change the depth of the needle on the slide .. thats the only thing that i could find about the carb in any of my books .. is that when rejetting, the slide needle will have to be adjusted ...

Edited by CK1999_400ex

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I merged your 2 threads on this subject, please keep your replies to this subject in this thread. Start a new thread for a new subject. Thanks.

* Added year and manufacturer to thread title.

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