The function of a motorcycle kick starter lever is to manually start the engine. Typically located on the side of the motorcycle, the rider uses their foot to kick the lever, rotating the engine's crankshaft to initiate engine start-up. This is particularly useful when the electric starter system fails or for cold starting the engine. The kick starter lever employs mechanical transmission to convert the rider's force into rotational motion for the engine, enabling it to achieve sufficient speed to start and operate normally.