The sump, also known as the oil pan, is a crucial component of a motorcycle's engine lubrication system. It is located at the bottom of the engine and serves as the reservoir for engine oil. The sump collects and holds the oil as it drains from the engine, allowing it to be circulated back through the engine for lubrication. The design of the sump typically includes a drain plug for oil changes and may also feature a baffle or pick-up tube to ensure proper oil flow.