Yes but why? Tuning a vespa is a matter of changing cam profiles, exhausts, crankshaft bearings, valve lift and so on.
Making a MiG-21 drop a bomb loaded on pylon 4 is a matter of what?
I don't know.
Why is it different to dropping a pair of bombs loaded on pylon 1 and 4?
I don't know that either.
If Cobra is sure that this isn't a capability possessed by the MiG-21 simulated then I presume that either he or Novak knows the answer to that question.