AHH I saw the link to his book, read the excerpts.. I am motiviated to keep searching for a 750 now... Man the book just from the minor details seems very throughout and helpful... Has anyone used his book as a beginner and had success rebuilding a bike or do any type of maintenance such as the 3k tune up? I wish he had a book on the 550..... In regard to hsi light relay switch, it states it is good for all cb550, but in the description states specific years... Will the relay work for my 78 550k?