O.E. style replacement 38T rear sprocket for 80-83 Kawasaki KZ550 C1-C4 LTD, 81 Kawasaki KZ550 D1 GPz & 82-83 Kawasaki KZ550 H1/H2 GPz. 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.