So I just got a Tomos targa A5 2 stroke has a separate tank. It is an 1994 or 1995 don’t know anyways replaced the carb petcock value and fuel line . The previous owner had let it sit for over 1 year . I got it running and driving but the exhaust keeps getting oil in side of it and spitting black oil . I put my hand in front of the exhaust and it stained my hand with oil and any time you run it you can’t tell it’s spitting oil until you put something in front but I was putting in my shed and it poured a stream of thick black oil. (edited)