1979 Sachs G3, it has a 505/1D with a forward mounted intake with round bing, I rebuilt the engine a couple years ago, but it may need some going thru. I cut all the sidecover mounting tabs off and welded a normal gas cap setup on the tank, (tank has rust inside.) Last time I tried to run it the bike died when I hit the front brakes. It has new tires, a 2-piece biturbo and cafe bars on it. I also have a spare parts engine and an extra seat box that goes with it. This would make a cool project. $250.