hi there. first, let me apologize for ignorance on part names and terms. on a '98 gs, at the end of the throttle cable as it meets the engine, right by the end of the choke as well, there is a crescent shaped part that opens and closes in a crescent motion as the throttle is opened and closed. on that piece, there is a screw. where is that screw supposed to be in terms of tightness? all the way screwed in? X turns out?
If its the one I think you are describing it provides the balance adjustment between the carbs and the answer to your question is.......it depends.
Unless you have a need to, leave it as it is and dont touch it. If you alter its position you will throw the carb balance out
It's the balance screw.
http://gstwins.com/gsboard/index.php?topic=56601.0
Balance links.
http://wiki.gstwins.com/index.php?n=Maintenance.5CarbSync
thanks.