Evening all

First proper post on the forum av finely getting round to my gsx400f 88 89 build and am after a second opinion. I know its a gsx600f frame with the gsxr 400 engine so when am looking for parts (engine wise) will any parts from 88 to 92 work on mines or do the engines change at all between those years? Am sure 93 onwards the engines where restricted or different in some way? Not sure if this is correct tho.

Any help would be appreciated thanks for looking

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