The behavior you're describing, where Harley Davidson riders let their motorcycles idle for an extended period before departing, can be attributed to a few reasons:
Warm-up: Some riders believe that warming up the engine by letting it idle for a few minutes helps optimize its performance. They believe this allows the oil to circulate adequately and the engine components to reach their ideal operating temperature. However, it's worth noting that modern motorcycles, including Harley Davidsons, are designed to warm up relatively quickly and don't require an extensive idle period for normal operation.
Tradition and Ritual: Motorcycling is often associated with a strong sense of camaraderie and culture. For some Harley Davidson riders, the ritual of idling their bikes before departing may be part of the overall experience and sense of belonging to the Harley Davidson community. It can be seen as a way of paying homage to the history and traditions associated with the brand.
Sound and Attention: Harley Davidson motorcycles are known for their distinctive rumbling exhaust notes, and some riders enjoy the attention and recognition they receive from the sound. By idling their bikes, they can draw attention to themselves and their machines, showcasing the unique sound and presence of a Harley Davidson motorcycle.
Personal Preference: Some riders may have personal preferences or beliefs about engine maintenance or performance that lead them to idle their bikes for an extended period. While this may not be necessary for the motorcycle's well-being, individuals may choose to follow this practice based on their own experiences or advice from others.
It's important to note that not all Harley Davidson riders engage in this behavior, and practices may vary among individuals. Additionally, excessive idling can contribute to unnecessary emissions and air pollution, so it's generally recommended to limit idle time to what is necessary for the motorcycle to operate smoothly.