Not Ranked
Mutt,
I had a similar problem in the rpm range of 2500 to 3000 which turned out to be a slightly overrich transionsition between the idle circuit and the main circuit. I discovered that it was overrich in this range after I installed an A/F sensor in my exhaust. To correct the problem, I changed from the original F7 emulsion tube that was provided with the setup to a F11 emulsion tube which has air holes high up and slightly leans out the transition. I would recommend installing an A/F sensor to help you with further tuning of your system.
John
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