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.
_________________
Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
MY BIKE PICS