Vortex CK2231 Chain and Sprocket Kit GFRA - GoFast Aluminum 520 Kit, 1 Down in the Front Stock Aluminum Rear Fits Honda CBR600F4 01-06 Kit Gearing, Ratio 3.07, Front 15 Rear 46 OE Gearing, Ratio 2.88, Front 16 Rear 46 Kit Components, Front 3273-15, Rear 251AK-46 , Chain 520SV3-108