Thanks, Scott, for the link!
Aha! A SOHC single, like Honda's Super 90 of the Sixties!
Mrdj, you can post pics directly into our Motorcycle Photo Gallery, All Other Makes section.
First of all, do your very best to find a service manual for it. Searching online is probably your best chance.
Tell us what you've done with the bike so far. Here's a good place to start. As good as any...
With any luck your cousin drained the carburetor and fuel tank when the bike was stored. If not, you'll need to first clean the entire fuel system. You may be able to tell by opening the carb drain screw and draining the contents, if any, into a clear container. Do the same with the fuel tank. Let us know what you find.
Let me get this straight... it's one down and four up, right?