>A tip-in sag can happen the instant you come off idle and no matter how slowly you open the throttle. This is usually caused by a lack of fuel coming from the Transfer slots, and can be aggravated by a too low fuel level. The fix for this is super easy, just park the throttles with more slot-opening underneath of them.
>A bog happens when
a) the throttle is opened too quickly, losing airspeed as the secondaries whack open too early/too fast; and the carb loses fuel delivery. Usually this happens on the secondary side. But a Primary side Bog is not unheard of.
b) or the accelerator pump is not timed right or of insufficient quantity.
>The fix for either of these is usually quick and easy. Slow the Secondary opening or retime it, and/or tune the pumpshot.