No, it is not required to let a motorcycle engine idle for a couple of minutes after a long ride before switching it off. This is a common practice known as "cooling down" or "idling to cool," but it is not necessary for modern motorcycles.
Modern motorcycle engines are designed to handle heat and are equipped with efficient cooling systems. They are designed to dissipate heat effectively, even after a long ride. Once you have finished riding, you can safely turn off the engine without needing to let it idle for an extended period.
Instead, you can allow the engine to idle for a short period, around 30 seconds to a minute, to let the internal components cool down slightly before turning off the ignition. This brief idle time allows for a smoother transition and helps prevent any potential heat buildup in the engine.
Additionally, it is essential to consider the specific conditions of the ride. If you've been riding in extremely hot or demanding conditions, such as heavy traffic or prolonged high-speed riding, it can be beneficial to allow a brief idle time to let the engine cool down slightly. However, for regular riding conditions, the brief idle time is more of a courtesy to the engine rather than a requirement.
Always consult your motorcycle's owner's manual for any specific recommendations from the manufacturer regarding cooldown procedures, as different models may have different guidelines.