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Thanks for the info. To narrow down one item at a time. What would cause the carb to not run smooth below 2500 rpm. Jetting, air/fuel? I've been making adjustments, but I can't get it to to work together. I have a Holley 770 Street Avenger. I just changed he jets to 77 primary and secondary. The air/fuel is turned out 1 full turn.
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