The easiest way to see what model your bike is to go to Kawasaki's web site and check vehicle information. Just put in your bikes VIN and it will tell you the model. Usually the difference between the 7R and RR is adjustable swingarm pivot, suspension internals, single seat, and transmission ratio, but I'm not exactally sure about the 92 model. Do to the 7R link in my siggy. I have no doubt that someone there can answer your RR questions.
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