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acording to the original service manual that came with my 87 yz 250 the idle setting is two complete turns from dead seated position plus or minus an eighth of a turn depending on what grade of gasoline you use i use 91 octane and mine idles fine at two complete turns minus about a sixteenth of a turn uriahroot15@AOL.com let me know how it turns out and any other questions

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13y ago

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