Chippy, I've got a 99 200, and no way would I use the pipe (and silencer) for anything but anchors. Why Kawasaki doesn't do something about it from factory, I don't know. For the price of the material of the stock stuff, they'd be able to get FMF or PC or someone to supply decent stuff.
It awakens the bike, stops the bike feeling so constipated and makes it fun to ride. I ran the torque pipe for a couple of months, but then tried the PC and preferred it. I can't remember why sorry, but next week I'll have changed systems to compare & can give the report then if wanted. (believe me, I'm usually using bottom/mid so that's my crucial points in a bike).
But the best thing you can do is get rid of the pipe, honestly. If I manage to stuff the two systems I have, before I rode again, I'd be buying another pipe (whichever one I could get first), I found the stock that bad.
I hope this helps some,