Yes all years remained unchanged; ...
Mostly
The 1986 model year had lower bar risers,
AND a lower windscreen to match. After that, the bars were raised (think ape hangers if you came off a '86), as well as the windscreen. About an inch on both items.
The mounting holes are the same across all years though, and Kawasaki did sell a 'tall' windscreen, so I'll give ya 2/3 credit
Rick