[FangShui]

Front Rotor:

http://www.sportbiketrackgear.com/galfer-yamaha-yzf-r3-2015-front-wave-brake-rotor/

Rear Rotor

http://www.sportbiketrackgear.com/galfer-yamaha-yzf-r3-2015-rear-wave-brake-rotor/

I know...WHY? What Does it do? Etc. Etc. ad infinitum. :|

Answer: JUST BECAUSE