Hello Ladies, I'm asking this question on behalf of my wife. Normally, she rides her own but on Sunday she decided to backseat it on mine (Harley Super Glide with backrest). I put a new seat on it last summer which she has never been on. After a dozen miles or so of going up and down a few ridges and hills, she let me know in no uncertain terms on every curve and slope it felt like she was sliding off. She never felt like this on the older pillion seat, which was a little bit wider. While the seat is new, it feels like a typical leather seat to me. So apart from using Crazy Glue, I'm open to any reasonable suggestions.
2009 Harley Super Glide ("Therapy")