Came across this little gem while trawling through forums which is what I do on a night to cure the boredom.
320mm rotors will fit GSXR 600/750/1000 K1/K2 and 600/750 K3.
TL1000R/S, GSXR 600/750 SRAD, Hayabusa 99/07.
Also with 4 little 10mm spacers (and 10mm longer bolts) you can fit these 320mm rotors onto a GSXR1000 K4 (which uses 300mm rotors as standard) to get some more braking power/heat dissipation. Whether it actually improves braking power, I do not know 100% but this is what I’m doing on my GSXR and we will see.