I've used many seat's, the one I have been most happy with is a Bell Honeycomb airgel. I got mine at a bicycle store and paid almost $40.00, then I found out they have it at Walmart half the price.
i have one basically like fairacing and am very happy with it. i also have a springer seat post also which helps. a seat for a motorized bicycle is diferent then you would want on a bicycle because your weight is shifted with pedaling and on your motorized bike all the weight is on the seat
I have ordered an EASY SEAT DELUXE. This is two pads with a split in the middle. I will post how I like it. I have old man (prostate) problems and can not stand pressure in this area. Hope this will help.