The washers are in the "storage" mode, available in case you want to "fine-tune" between grooves in your KLX needle. A washer shims the needle a distance less than moving the clip to the next groove would; thus, the washers provide granularity of adjustment between needle grooves, should you ever need this precision.
Should you ever want the needle elevation of a washer or two only (i.e., less than a whole groove change provides), move the washer(s) to a position under the needle.
Make sense? Sorry; didn't think so!
As klr4evr says, looks like the PO already tuned the carb. Unless you don't like how your bike is running, leaving things as they are may be your best strategy.
BTW, you do not have to remove the carb to perform the 22-cent mod (NOW I tell you, right?); you can loosen the carb duct hose clamps and rotate the carb for access to the mixing chamber cover (black plastic thingy with 4 screws on top) and pull the diaphragm and slide (you can access the fuel screw cap similarly); better if you unscrew the plastic cap holding the "choke" (starting enricher) cable, but . . . word-on-the-street is, some have gotten away without fooling with this troublesome, fragile component . . . keep this in mind for, "next time!"
Last edited by Damocles; 02-04-2011 at 12:46 AM.