OK so ya made me wonder because I usually don't forget things like this, and I quote the 93 Exciter manual page 2-5...........
adjustment steps
Loosen locknut
For EX570 E/ST (your sled) Hold the throttle lever at full throttle position, turn the adjuster in or out until the adjustment mark is aligned with the end of the adjuster. (the adjustment mark being a dot on the cable casing)
This is for the models with roundslide carbs.
It goes on to say to talk about a free play adjustment, but that is not for your sled but for an SX which has flat slides and has a whole different set up. That adjustment is 23-25mm.
The ONLY exciter to be set-up in the idle position is the 87' with original butterfly carbs, they are set like a Phazer. Free play adjustment of .984