The starter clutch, also known as the one-way clutch or starter drive, is a component in a motorcycle's starting system that allows the starter motor to crank the engine and then disengages once the engine starts. It consists of a set of gears or rollers that engage with the engine's flywheel or crankshaft to turn the engine over. Once the engine starts and reaches a certain speed, the starter clutch disengages to prevent the starter motor from turning with the engine. This component ensures smooth engine start-up and prevents potential damage to the starter motor.