I had a few Honda PCX bikes over the years, which had a very hard seat. I solved the problem by getting a custom made seat with extra foam padding in the front area where I sit. That also made it way more comfortable to drive on a rough road. For the last 3 years I have driven a Honda ADV150, which has a good suspension, so extra padding has not been needed. I've heard that that ADV150 was to high for thais, so Honda made the later ADV's with a lower sitting hight. If they just did it, by removing a few centimeters of padding in the seat, the seat may need to be customized for better comfort. Make sure that you get your own bike seat customized, so you don't end up exchanging it for a cheap aftermarket seat.