Look at the supplement's index, that tells you what the differences are straight away. If the supplement doesn't mention something, then it's the same as the base model.
Get the manual, it describes the differences from the base model and year in the supplement at the back. There are heaps of minor differences, cdi, carbs, body panels, chain or shaft drive.. Those are some I've noticed, there might be more.
I thought it would probably be the Mikuni, they are good carbs. You may have to get a kit just to replace the gaskets, i wouldnt replace the jets they are OEM. Looking at the photos you sent i also thought it was an 86.