I'm looking for a bike for my fiancée. I want something fuel injected so the Kawasaki Ninja 300, Honda CBR250R, or Honda CBR500R. The 300 would be my first choice. My obvious concerns are about what needs to be upgraded first. I can see aesthetic mods such as the fender eliminator, but I'm talking more about comfort. I've seen the Corbin seat, but I'm assuming the suspension on the bike needs an upgrade since it's a budget bike. I've got an extra ZX-6R front end I could put on the bike if purchased as well as an extra ZX-6R rear end. I know I can make the front end swap, but does anyone know if the rear end swap is possible?