I dunno about Trabants, but one of my motorcycles is a two stroke (a Cagiva Mito) and except when it's cold and on the choke, you definitely can't see any smoke

I dunno about Trabants, but one of my motorcycles is a two stroke (a Cagiva Mito) and except when it's cold and on the choke, you definitely can't see any smoke coming out it's exhaust. It's certainly burning the oil, it goes through about 1 litre of oil every 1000km or so. It runs an oil pump, so there's a separate tank for fuel and oil, and the pump mixes them before the carburetor.