I bought a Puch Sport MKII in REALLY bad shape. It was ok aesthetically, but mechanically, it was a wreck.
New Connecting Rod
New Crank Bearings
De-rusting of crank webs
De-rusting of crank case
replacement of transmission cover bearings
First gear slipper bearing replacement
Leaking Gas tank (not petckock... I filled the bottom of the frame with JB weld to fix it).
Minor cosmetic stuff