Käynnistyspolkimet

Käynnistyspolkimet, often referred to as kickstarters, are mechanical devices used to start the engine of certain types of vehicles and machinery, most commonly motorcycles. This system replaces or supplements electric starter motors. A käynnistyspoljin typically consists of a lever that the user rotates with their foot. This rotation engages with a mechanism within the engine, usually connected to the crankshaft. By applying force to the lever, the crankshaft is turned, which in turn rotates the engine's internal components, allowing for the combustion process to begin.

The design and operation of käynnistyspolkimet can vary. Some are fixed, while others are foldable for convenience. The amount of force and the technique required to start an engine with a käynnistyspoljin can depend on the engine's size, compression ratio, and the specific design of the starter mechanism. Historically, käynnistyspolkimet were the primary method for starting engines on motorcycles. While many modern vehicles feature electric starters for ease of use and convenience, käynnistyspolkimet remain prevalent on many off-road motorcycles, smaller displacement engines, and vintage or classic vehicles where simplicity and weight reduction are prioritized. They can also serve as a backup starting method in case of electric starter failure.