I'm just posting this for those who may be wondering this, or may be doing a search in the future. No need to reply.
I just replaced my rear shock with a shock from a 2003 Katana 600 and it worked great. The Katana 600 rear shock DOES NOT have a remote reservoir, however the Katana 750 DOES have a remote reservoir.
Personally I didn't want to deal with relocating a reservoir. Anyway, enought blabbering! :mrgreen:
Search words: 2003 Katana 600 rear shock replacement '03 GS GS500
Well since they haven't changed the Kan-o-tuna's innards sigificantly since '89 or so...
:roll: