What I found while I was doing my searching the 86/87 200x front hubs are the same for both years.
The 85 350x has a slight grey black colour and has those small nipple tabs on the end of the hub. Opposite to each other. Same as the 85 250r hub. 250r is gold in colour.
I also see a lot of 350x hubs mistaken. Behind the stud if you have a nut it’s a first gen 200x hub