Ya, as Squish says, without a tach, but you need to know the sound that you are looking for so that the saw isn't running too lean and can risk damage. There should to be some remaining two stroking sound at max revs (WOT). Also, the adjustment on one needle can affect the other. Adjust from a richer setting to a leaner one. Carb condition can somewhat vary the specs from the factory setting, the general condition of the saw, and your location and season. Some saws the adjust never needs to be touched, others are more temperamental, has been my experience.