STEVE,
I used Permatex MotoSeal 1 Ultimate Gasket Maker Gray item #29132. Believe it or not, this is what the Honda dealer in Japan gave me to use for sealing the cases.
PM me your home email address and I will send you a few really good pics that I obtained from JHA that explain how to properly port and epoxy your NSR cases.
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Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
MY BIKE PICS