The best bike in the world is scrap--or soon will be--unless you learn how to use it. The most powerful piece of high-performance hardware is between your ears. To help you program it with the right information, we've assembled 50 potentially lifesaving bits of street savvy. Some you'll know, some you won't. All are worth remembering, because when it comes to riding motorcycles on the street, the people over at the Motorcycle Safety Foundation (www.msf-usa.org) have the right idea with their tagline: The more you know, the better it gets.