If you're a member of the KTMtalk forum you might post the question over there. They have a sticky in the jetting section for setting up the SmartCarb that is fairly active and frequently updated. I couldn't ever get my SmartCarb to idle consistently but I can't rule out an air leak (maybe crank seals). I reinstalled the PWK but can't get a consistent idle with it either. If I ever get around to replacing the crank seals I'll try the SmartCarb again. Sorry, I'm not more help.
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'05 EC 300
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