R6 rear shock on the FZS600

[AzzA1990]

There was some info on the old Yuku site about this.
Yes, bit of a squueze but it'll fit, apparently.
You'll need to swap the heavier 600 spring onto your 1000 shock if keeping the standard linkage unit. You also need to do something with the coolant reservoir - don't remember whether it has to be relocated slightly.  You will also need revised length dogbones as the 1000 shock is about 5mm longer than the 600 unit

Why do i have to change the springs over? was hoping i wouldn't have to do this as my 600 spring has gone all rusty and the powder coating has started to flake off which makes it look really tatty, at the minute i have dog bones on that give the rear end a 30mm rise but i wanted to switch back over to the standard dog bones when i fit the new 1000 shock, i'd a thought it could be done right? Thanks for the reply!