sorry to resurrect an old thread, but I thought I'd ask in here since it was relevant...
My Viva Sport is stamped "Sakae Custom" and "SR Road Champion" on the handlebars, and the seat has the word "Italia" at the back and a Univega logo on the side of the seat. SunTour components... It is a very tall bike, probably around a 37" standover height.
I'm curious what year it is? here is a rough pic, I can take better ones if necessary