Chase'em, your 1984 Sporty should be oil tight...maybe new gaskets, o-rings and such are needed. Clean the bike REAL good and chase after a short ride in town, not too much speed to allow oil to spread everywhere, you will probably find something like drain plug gasket, cracked o-ring, derby cover gasket or fasteners put on without sealer and the like causing the leaking. Some say that putting the primary cover gasket dry is best, using guide pins/fasteners to ensure alignment and tighten progressively in proper crisscross sequence 3 or more levels prior to final torque.