Actually, you do have a ZXR750, but it is not an R model. ZX-7's were produced as the regular base model for '89 thru '95 with a couple of model changes. The ZX-7R was produced in '91 and '92 for the previous model and '93 only for those models. The R models featured the close ratio tranny, aluminum gas tank, flat slides, hopped up suspension, etc.. It was produced in limited numbers for that year only. When the new model came out in '96, the base model was designated ZX-7R (ZXR750R = European designation) and they again produced a souped up version known as the ZX-7RR in '96. The easiest way to tell an R or an RR from the rest is the factory solo tail section that does not have a rear seat.
You're bike is a '95 ZX-7 (ZXR750), not the R model. Just thought you might like to know.