Good read: Motorcycle Electrical Systems
I just finished reading a very informative book on motorcycle electronics. It is Motorcycle Electrical Systems: Trouble Shooting and Repair by Tracy Martin. It is relatively straight forward and contains lots of color illustrations. It discusses all the electrical systems used on old and new motorcycles as well as how to diagnose various problems. Electronics have always been my Achilles Heel and this book taught me a great deal. Well worth the read.
2008 KTM 450 EXC-R (NCHSA #388)
2008 Yamaha FZ1
2008 Toyota Prius