Vortex CK4133 Chain and Sprocket Kit WSS - Warranty Steel Kit, Stock Gearing Fits Kawasaki ZX-9R 02-04 Kit Gearing, Ratio 2.63, Front 16 Rear 42 OE Gearing, Ratio 2.63, Front 16 Rear 42 Kit Components, Front 2910-16, Rear 454S-42, Chain 525RV3-110