My first bike was a 1976 CB550F. I wish I had never sold it. but now I have a 400F and I am totally happy. I know that the tank is squarish, and I never had a problem with the seat rivets, come on? really? And the pipes? really How else do you expect 4-1 pipes to look on such a small bike? I wish you could remove this bike from your blog, there are certainly many other ugly bikes out there. And I think that allot of 70s Four owners would agree.