Tell us more about the first pic, GMC. Taking a photo of a bike in the pits is one thing, but getting a sit on a year-old works bike is a pretty big deal - particularly if you were away from a race meet/team workshop/museum (as the background suggests).
FWIW, the production 125 got the 'normal' linkage in 86. The production KX250 & 500 got it in 87.