Fred, I know this... I have the C14 DVDs because when I first got the bike, I saw the manual was nothing like the Honda manual of which I am very familiar. I knew very little about the C14 but after watching them I discovered that all of the crying and whinining on the other boards about how difficult the C14 is to work on would be unnecessary if some of them had bought the DVDs. Same thing here.If you are only going to get one, get the OEM Honda manual. Its worth its weight in gold and is one of the best written service manuals I've ever seen.