Without functioning electrical systems, even the strongest motorcycle is just a collection of interesting machine parts. Few things frustrate a motorcyclist as much as the antics of mysterious "copper worms" in the wiring harness of their two-wheeler: fuses constantly blow when signaling, the motorcycle devours headlight bulbs, and the ignition suddenly fails. There's no reason for rash actions—some basic knowledge and a consistently systematic approach will surely lead to the core of the problem. Hans Hohmann, a motorcycle journalist and long-time leader of technical courses, provides assistance with humor and clear language: step by step and component by component, motorcycle electrics are explained. Principles of operation, sources of errors, and possibilities for improvement are presented. Tips and tricks, along with a programmed troubleshooting guide, offer practical advice.