Yes, motorcycles can vibrate when idling, and the level of vibration can vary depending on various factors. Motorcycles, especially those with large displacement engines or certain configurations (such as V-twin engines), tend to have more noticeable vibrations at idle compared to cars or other vehicles with larger engines.
The vibration is primarily caused by the reciprocating motion of the engine's pistons, which creates a pulsating force that is transmitted through the motorcycle's frame and components. The engine's design, number of cylinders, and balancing mechanisms also influence the level of vibration.
Additionally, factors such as the engine's condition, idle speed, and the overall balance of the motorcycle can affect the perceived level of vibration. Some motorcycles are equipped with counterbalance systems or rubber mounting systems to minimize vibrations, but some degree of vibration is generally present, especially at idle.
It's worth noting that excessive or abnormal vibrations could be indicative of underlying issues with the engine or other components. If you notice a significant increase in vibrations or if the vibrations feel unusually intense or rough, it is advisable to have the motorcycle inspected by a qualified mechanic to identify and address any potential problems.