Vortex CK6124 Chain and Sprocket Kit GFRS - GoFast Steel 520 Kit, 1 Down in the Front Stock Steel Rear Fits Yamaha YZF600R 94-07 Kit Gearing, Ratio 3.36, Front 14 Rear 47 OE Gearing, Ratio 3.13, Front 15 Rear 47 Kit Components, Front 3270-14, Rear 641AS-47, Chain 520SV3-108