I picked up this sport for my wife and now i ride it. I couldnt find a top box mount for it so i made my own and put on a bestem 929. It actually works well. The passenger can still use the factory lower back pad and if she wants to lean back just a bit she can lean on the back pad on the top box plus the lower one. Its very easy to make the drivers seat back pad brackets to raise the backrest on either bike if wanted. It is plently capable for me and the wife to ride on. My wife put on the foam pads incase she fell over.