valpo900kawzxi

I just purchased a 95 & 96 Kawasaki 900 zxi. I am newer to jetskis and seem to need to replace the starter in the 96. I have removed both starter bolts, however the starter is not budging? Any ideas on removal without taking off the exhaust/muffler. If I do remove these exhaust items, do the metal gaskets need to be replaced or are they reusable?

Thanks -