The term "kick" in reference to a motorcycle is generally used to designate the "kick-starter". This is a manual mechanism for starting a motorcycle engine by kicking a special pedal, often located on the right-hand side of the motorcycle.
Here's how the kick-starter usually works on a motorcycle:
Positioning: The kick-starter is usually located on the right-hand side of the motorcycle, close to the footrest.
Engagement: The rider lowers the kick-starter with his foot to engage the mechanism.
Kick-starter: By pressing down on the kick-starter with force, the rider manually turns the engine crankshaft, achieving sufficient rotation to start the engine.
Automatic return: After kicking, the kick-starter automatically returns to its original position via a spring mechanism.
It's important to note that many modern motorcycle models are equipped with electric starters in addition to, or instead of, manual kick-starters. Electric starters are more common on street bikes, while kick-starters are often found on off-road, classic and some small-displacement motorcycles.
The kick-starter can be useful in situations where the battery is weak, or where other electrical problems prevent starting with the electric starter. This is why off-road bikes and some lightweight motorcycles are often fitted with kick-starters in addition to electric starters.