My Road King has the back rest down low and is fitted with the removable mount set up.  It bugs the Pillion in a Million so bad she doesn't want to go far with me any more.  I have looked at the parts guide and at some after market stuff but does anyone have any other ideas on how I can make this better for her. I reckon it needs to be a bit higher so it is in the "small" of her back rather than so low. 

It is too low and pushes her forward in the seat so she cannot get comfortable.

 i have a adjustable one for the softail not sure if you can get them for your model.

also it appears you have a sheep skin cover on your seat that would make the passenger sit up higher resulting in the backrest supporting her lower.

http://www.youtube.com/watch?v=LiEx_tSR69o

 

http://www.youtube.com/watch?v=gC85Uia1VjI

Yeah took the sheepy off but still no better. Like the adjustment tho and like the higher back on the rest. Will look into this much further to resolve it for her.