2011-2015 Kawasaki Ninja 1000 ZX-10R ZX1000 Front & Rear Sprockets 15/42 Race-Driven Sprockets are made from high quality steel to meet or exceed OEM specifications. 15 Tooth Front Sprocket / 42 Tooth Rear Sprocket Fits 2011 2012 2013 2014 2015 Kawasaki Ninja ZX-10R ZX1000