Hi, I have a 1975 CB550K1. I am trying to find out what the difference is on the grab bar from a 1977 CB550F and my bike. I have looked on the Honda parts sites and the part number is different for the bar but the fender and the tail light bracket part numbers are the same. Surrounding parts are the same, so it should fit, right....... yaaa. My bike came without a grab bar and all I have is a picture of the 1977 bar.