I've never ridden a 97 or 98 model, but I'm told the clutch engagement is much smoother at higher RPM's because of the judder spring. If I try to launch my 99 at anything higher than 4k, she bucks like a bronco. If you like to launch hard, don't take it out.
I had the same situation with the shuddering on my old 83' CB1100F. It was a glazing issue with the steels/clutches. Even if you replaced your peices with OEM stuff, you would solve your issue.
BTW, with all stock internals in my 01' , I have launched as high as 7500 rpm with no shudder at all.
My experience was not really a shudder. "Grabby" is probably a better description. All I know is that the "clutch cushion" mod I got from Brock Davidson made it feel more like the cable-operated clutch on my old Katana 1100. Easy modulation and baby smooth at any RPM.