Hi all. New to this forum. I have a 2004 ZZR600 that I've owned since 2007.
In 2010, I replaced the 530 stock sprockets (16T front/48T rear) and 112-link chain with the RK/Vortex 520 Quick Acceleration kit. The kit has the -1 steel front (15T) a 48T aluminum rear and GB520XSO chain.