Idle mixture adjustments stop having any effect somewhere around 1K RPM. There's a "part throttle" port slightly above the one with the idle mixture needle on most carburetors that's drilled according to engine size to aid in transitioning from idle to part throttle. it isn't adjustable.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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