O.E. style replacement 41T rear sprocket for 81-83 Kawasaki KZ1000 J1-J3, 82-01 Kawasaki KZ1000 P1-P20 Police, 82-83 Kawasaki KZ1000 R1-R2 & 81 Kawasaki KZ1100B1 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.