The 02 ZX had the worst track doo ever produced. I know, I have one. I installed a take off 151 x 16 x 2 from an 05 Rev. Easy to do. Pretty tight fit. Some guys grind a few bolt heads and rivits. I just stuffed it in and ran it. It rubs once and a while in the front. I think on the bolts up front some where. not enough to bother anything. Got about 1500 miles on it with no problems.
I don't ride the ZX anymore but still keep it for a backup sled. The 02 already has the skid setback so you may want to get extensions if you go 159
Anything will be an improvement over the track you are using now.
Crasher