I have a 1959 D1 125, and so bought the book late last year, since then I have read the whole book from cover to cover (It isn't very big). One striking thing that took me, was the obvious date that the book was written, it refers to the production of the bantam ceasing "some two years ago", which puts the date of the book at 1973. Some measurements are thus only given in imperial units, though there is a handy conversion table in the back of the book. Some of the dates are a bit out, so check with other sources before buying expensive parts. I have mostly used the sections on ignition, electrics and carburation, and have found these adequate, I have yet to split the crankcase. The main thing I disliked about the manual, was when my generator developed a fault, and I consulted the manual. It's suggestion was that, as I was unlikely to have a multi-meter (which I do), It was best to get it fixed by an auto-electrical expert. That is very poor and I think defeats the whole object of having a Haynes manual, I eventually fixed the problem myself by reference to some other sources. I think the content of the book could be doubled, especially as it is only 88 pages long. An update is in order, with reference to things like, new spark plug grades, and quantities of two-stroke oil, which could now probably be halved. In the main though it is all there, and very useful, I have religiously kept up the maintenance routines and things have run perfectly so far. I use the Bantam every couple of days, and have covered 700 miles since Christmas (written in June). I am 18, and a provisional motorcyclist, and the Bantam is my first bike. If it wasn't for my Haynes Manual, the bike would either be rusting in the Garden, or I would be a lot poorer.