Advice wanted: interpret this passage in the tuning procedure?

[Bill Saidel <saidel@crab.rutgers.edu>]

In the sequence for tuning, the following is stated:
   "Turn each jet adjusting screw the same amount clockwise to enrich, or
anti-clockwise to weaken, until the FASTEST rpm is indicated, then turn
each screw anti-clockwise until the engine speed just begins to fall."

 What does FASTEST rpm mean in this context?
I mean, my tach goes to >5000 rpm but I doubt that that is what is meant.


Bill Saidel