HARLEY-DAVIDSON Pulley Custom Ultima chopper. I used to build motorcycles for a living. My dealership was iron cross motorcycles. This pulley I had left over from the last build.. It's approximately 12 1/2 inches in diameter and 1 and 3/8 inch wide. It is signed on the inside of the pulley capital AMW/4.0505 I'm not sure what that means. I used to order everything I got from he ultima catalog, and I'm sure this is an ultima pulley. It has quite a bit of flaking and chipping on it. It only has 2 mounting bolts that are included. It would be a great project to Sand blast and to power cote. This Polly was only on a rolling chassis.