all right i know this is a honda forum but i also own a 98 suzuki gsxr 600 i have a bad hesitation at about 2,000-3,000 rpm when under load taking off or parking lot cruising i have a full yosh exaust and its jeted could the jets be causing this or could there be another problem. thanks for your help

 

Im not a mechanic, and surely you'll get a better answer from somebody else, BUT, i think it means you need carb/injectors cleaned and sync'd