I bought this book for my 2001 900SS even though it is outside the covered year range, and I found this book to be the best Haynes manual I have ever used. It is much more user friendly in its layout and descriptions of tasks, and I found alot of good advice for the maintenance I already knew how to do, such as bleeding brakes, etc.
I checked the valve clearances, and although the book was informative on how to proceed with removing the shims, etc. I did back off from that. I plan to talk to a couple of mechanics before I actually do remove the shims for replacement. Even so, the book was there with good advice: put some heavy wire into the vertical piston spark plug hole to hold the intake valve after you remove the bottom shim!