The SV650 rear brake is too aggressive and if you're not careful can be locked up.
Very few use the rear brake and when you do, you really don't want it to lock up. By reducing the surface area, you lessen the outright braking power, thereby decreasing the chance that you will activate the "crash indicator" as the STT instructors like to call it! And since you're reducing rotation mass, you also make it easier for your bike to accelerate. Granted, it isn't a lot of weight loss but every little bit helps and especially in the wheel area.
I found a lightened rear rotor that was made for the GSXR series and it will fit on all 2nd generation SV650's
The GSXR rear rotors have been machined to make them lighter. 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 2001-2009 GSXR600, 2000-2009 GSXR750, and 2001-2009 GSXR1000.
Stock 2md generation rear brake rotor
Stock GSXR rotor. Even though the part number is different and mounting tabs are configured differently it will fit on a 2nd generation SV650
Lightened rear brake rotor.
Lightened rotor on SV650 rear wheel
Lightened rear brake rotor installed on SV650
If you're interested go to this
http://forums.13x.com/showthread.php?t=220458&page=2
and send a PM to jcivince.
Doug
Very few use the rear brake and when you do, you really don't want it to lock up. By reducing the surface area, you lessen the outright braking power, thereby decreasing the chance that you will activate the "crash indicator" as the STT instructors like to call it! And since you're reducing rotation mass, you also make it easier for your bike to accelerate. Granted, it isn't a lot of weight loss but every little bit helps and especially in the wheel area.
I found a lightened rear rotor that was made for the GSXR series and it will fit on all 2nd generation SV650's
The GSXR rear rotors have been machined to make them lighter. 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 2001-2009 GSXR600, 2000-2009 GSXR750, and 2001-2009 GSXR1000.

Stock 2md generation rear brake rotor

Stock GSXR rotor. Even though the part number is different and mounting tabs are configured differently it will fit on a 2nd generation SV650

Lightened rear brake rotor.

Lightened rotor on SV650 rear wheel

Lightened rear brake rotor installed on SV650
If you're interested go to this
http://forums.13x.com/showthread.php?t=220458&page=2
and send a PM to jcivince.
Doug