I currently have a 89 ZX7 front fork on my RS.
It's getting replaced with a 1995 ZX9 front end from a Kawi.
The steering stems are the same size so it's a straight swap.
The ZX7 forks is basically the same but the ZX9 is 4 or 5 cm longer and thats nice for comfort imo
For anyone wondering about the ZX forks,they are USD forks and have adjustments for Rebound,Compression and preload.
Mikey