Hmmmm....
Interesting discussion about Haynes manuals. As a poor college student I couldn't afford to pay someone else to maintain my little CB125s back in 1975 so that I had reliable transportation to & from Navy College. My saying of 'If someone else can do it, then so can I' still rings true.
I bought my first Haynes manual not long after buying the little 125 & pretty soon I was replacing front wheel spokes & had the carb apart to check float heights, not because of the Haynes book, but because I found it easy to do. The Haynes has always been a source of reference for things like the torque wrench settings or how to work out which crank bearing shells to buy.
I used the Haynes CB750 manual for my CB750F2, not for the information that was missing for the F2, but because of the wiring diagram in the back. Having the engine apart became second nature after the first time.
I have since rebuilt several engines & complete bikes with Haynes manuals to hand but rarely used them. I tend to keep service interval records in them as I know that I can find them in a drawer in my tool rack easily.
As for the lies that are printed in them....when I have referenced the Haynes Yamaha R1 manual against a genuine Yamaha one, the figures have been lifted straight from one to the other. Only a few figures in the torque wrench settings caused me to question the figures, like the recommendation to do the rear wheel nut up 150Nm, a figure completely out of all proportion to what is adequate. But it was in the genuine manual, so what else is Haynes supposed to use?