When i took the top covers off the diaphragms, I never saw any o-rings fall out. I do see a tiny round cut-out where it looks like one might would go BUT looking at the carb schematic parts list it doesn't show one. Am i correct in assuming this year model does not require the rubber o-ring under the diaphragm cap?

http://www.suzukipartshouse.com/?gclid=CLTR6Z7O664CFQuf7QodEiZmJg#/Suzuki/GS500F_(2005)/CARBURETOR_(MODEL_K4%2f%2fK5%2f%2fK6)/021980002/56021980013A

nope. i asked the same question a week ago
http://gstwins.com/gsboard/index.php?topic=59477

Thanks brother. Just wanted to make sure.