and if you dont mind taking a bit of time,make sure not to touch the screw in there,and once the plugs are out,screw each in till they lightly seat;please make sure to count the number of rotations in 1/4 turns,take notes for every carbs...you"ll probably find out that every carbs are setted differently!
we had a theory about this 3 years ago talking about the matter;most came to the conclusion that the factory guys setting the carbs did them all on a friday afternoon with a few shots of sake...lol
but i brought my theory,being that different carbs with different specs and machining tolerances would need carefull tuning according to its flow properties(and the flow from the inlets tracts,etc)thus the importance of taking notes on each and everything you modify.
could be of help if you decide to go back to stock exhaust one day being to sell the aftermarket stuff separately or else.
after all,why was i bringing up that theory of mine?
ask yourself this question:"was my bike running flawlessly off the dealer showroom floor?"
answer: yes it was...then again got to take into consideration the new full system properties or even the one from a slipon...