one thing to keep in mind is the accuracy of the gauge you use. i learned a long time ago (i think it was on Paul Yaw's site) that many popular gauges are notoriously inaccurate. years ago, when i was tuning my Dell'Orto, i paid much closer attention to the engine and what it was telling me, as opposed to the gauge. if i recall, the engine pretty much liked to be about 1 PSI (indicated) lower than what was recommended by RB.
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