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Carb Tuning

I've never been good at carb tuning. I got a 750 Dp on the car now. It seems to be running pretty good for the moment. When adjusting the idle mixture,the engine seems to run best (highest vacuum/idle speed) with the nedles turned almost all the way in. Does this mean that I'm running rich and need to down size my jets? This goes for all four corner adjustments.
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