A properly cleaned and lubricated chain is CRITICAL to bike performance. It is probably the most often overlooked and neglected part of the bike and yet is so critical to the riding experience. Chain drives require a lot of maintenance! Other drive types need little or no maintenance, like shaft or belt-drive, but chain drive provides huge weight savings, efficiency, and toughness that these other drives can't match, but ONLY if the chain and sprockets are properly maintained. Improperly maintained, dirty, dry, and worn chain drives can lead to poor fuel economy, excessive noise, vibration, lack of power, and can result in your being left stranded on a dark desert highway when they fail. Follow this chapter to find out just how to keep everything in tip top shape with this critical system.