Seems zeda 80 is out of stock .....
Do yourself a favor and do your research and spend a little more money and you wont regret it. Quality motors have been ported and gone over to remove blockage and casting flaws. A steel sleeve cylinder with a tuned piston with a balanced tailpipe maybe a nice Delorto? Carburetor and a set of carburetor jets ( 60 through 75 diameter will cover all bases) .
Pay attention to hub sizes and spoke patterns. Be aware that slight add ons like a case mounted spring loaded chain tensioner or a longer tailpipe quickly diminish clearence of other parts as per front pedal arms ect.
Map it out before you start your build. It will save you backtracking.
And ride it like you were invisible to everyone...
Right on ride on.