O.E. style replacement 42T rear sprocket for 78-79 Suzuki GS1000 C/N, 78-80 Suzuki GS1000E C/N/T, 79 Suzuki GS1000L N & 79-82 Suzuki GS1000S N/T/Z. If you wish to order a different size sprocket to change your gearing, feel free to give us a call to order the size you desire.