Im currently tearing apart a 1981 honda express and noticed the cause of a bunch of oil all over the case. There is oil leaking where the intake and reed valve are bolted to the case. I removed the reed valve and it seemed to have light surface rust on the part that attaches to intake and case. I checked all the books and it does not seem to require a gasket. This seems odd, I torqued it to factory spects but, I'm considering using a little gasket maker to make a seal. Any Suggestions?