MiG-29 Fulcrum Smoke
Sorry, bit late in coming into this discussion. Back in the mid-80s I spent many happy hours watching early-model Fulcrums, both Soviet AF and East German, and have no memory at all of smoke being particularly noticeable. Fitters, on the other hand, I do remember producing clouds of the black stuff. Could just be age and decrepitude catching up with me, or that smoke was so normal that we just failed to register it!