Hello - Been out of it for a while but back to machining GSXR rear rotors again. I buy used stock rear rotors, check them for flat, if OK then machine them to lighten them up. There's an older thread of mine here if you want to take a look - quite a few pleased customers. For an older GSXR (2000-2003 version), you lose 1.19 pounds. On the 2004-present versions, you lose 0.805 pounds. These should fit 2001-2015 GSXR600, 2000-2015 GSXR750, and 2001-2015 GSXR1000. Price is up a little to $70 shipped to the lower 48 states for the standard cut rotor. I can ship outside the lower 48 but it will be more $$ (send me your address and I'll get a shipping quote). Paypal works fine for me. I also have an arrowhead version that's $90 (more machine time and tool change). Just a note that these rotors reduce rear brake capability by A LOT! Anything over 25 or 30mph and you basically cannot lock up the rear wheel. If you tend to use your rear brake a lot, especially on the street, I definitely DO NOT recommend you buy one. They also produce a pulsing feel when you do use the rear brake. I don't want anyone to be surprised when/if they buy and use one of these on their bike. If this is any way concerns you, please do us both a favor and don't buy one from me. Thanks!