I found some OEM mono shock eye to eye dimensions…this may help with future mods. by the way eye to eye means hole to hole in other words means centre of hole to centre of hole.

89-99 FZR600 shock is 11.938“ eye to eye…i am not saying any of these shocks work but they will give you an idea on length before you buy if you choose to upgrade to any of these were shocks.

• 97-00 gsxr 600 13.750” eye to eye

• 01-03 gsxr 600 13.000“ eye to eye

• 04-05 gsxr 600 TBD

• 06-07 gsxr 600 12.375” eye to eye

• 08 gsxr 600 TBD

• 96-99 gsxr 750 13.750“ eye to eye

• 00-03 gsxr 750 13.000” eye to eye

• 04-05 gsxr 750 TBD

• 06-07 gsxr 750 12.375“ eye to eye

• 08 gsxr 750 TBD

• 01-02 gsxr 1000 13.000” eye to eye

• 03-04 gsxr 1000 TBD

• 05-06 gsxr 1000 13.000“ eye to eye

• 07-08 gsxr 1000 TBD

• 03-08 sv1000 12.875 eye to eye

• 03-04 zx6r (636) 13.375” eye to eye

• 05-06 zx6r (636) 13.400“ eye to eye

• 07-08 zx6r TBD

• 04-05 zx10r 13.250” eye to eye

• 03-04 cbr600rr TBD

• 05-06 cbr600rr TBD

• 07-08 cbr600rr TBD (non link shock) (means no linkage)

• 99-02 R6 TBD

• 03-05 R6/06-08 R6s TBD

• 06-07 R6 11.450 eye to eye

Hope that helps you make a decision :-}