Cafe racer seat will fit Honda CX500 Deluxe Standard model, will not fit Custom model. Seat pan has being modified, you will need to remove rear fender and the bar on top of rear fender to fit this seat.
you might need to make seat bracket as well, this is a same seat that show on Discovery channel.
please read it very clearly before making the purchase. you will need to do some work to get it fit on your bike.