There are pictures around here somewhere. It's on the bottom part of the carb closest to the engine, between and slightly forward (towards engine) of the front two (of the 4) screws that hold the floatbowl on.

Do NOT confuse it with a close-by brass "dimple" that is visible in one of the holes.

Not all bikes have the anti-tamper plug...


(one) 2006 XT225, (two) 2005 XT225, 2006 FZ1