"You should buy this Sight Glass"

The engine sight glass is a transparent window or lens located on the engine or engine casing that allows the rider to visually check the level of engine oil or coolant. Positioned typically on the side of the engine, it provides an easy and quick way to monitor fluid levels without the need for additional tools. The sight glass is crucial for ensuring that the engine operates with the correct fluid levels, helping to maintain proper lubrication, cooling, and overall engine health.