It is not a universal practice for all Harley-Davidson riders to take off their helmets and wave at people after parking their bikes, even for a short duration. The action you mentioned may be observed in certain instances, but it's not exclusive to Harley riders and can vary based on individual preferences, cultural norms, and regional customs.
That said, some motorcyclists, regardless of the brand they ride, occasionally choose to remove their helmets and engage with others after parking their bikes. Here are a few reasons why someone might do this:
Social Interaction: Motorcycling can be a social activity, and some riders enjoy connecting with other riders or enthusiasts. Taking off the helmet and waving at others could be a way to acknowledge fellow riders, initiate conversations, or simply share a sense of camaraderie within the riding community.
Displaying Enthusiasm: Motorcycle riders often have a passion for their bikes and the freedom of the open road. Removing the helmet and waving can be a visible expression of their enthusiasm and love for the motorcycling experience. It can also serve as a form of self-expression and a way to showcase their pride in their bike and the riding culture.
Local Customs or Traditions: In certain regions or motorcycle communities, there may be specific customs or traditions that involve acknowledging other riders. These customs can vary widely, ranging from simple waves to complex hand gestures, and are often deeply rooted in local riding culture.
Safety and Comfort: While it's important to prioritize safety and wear a helmet while riding, some riders may find it more comfortable to remove their helmet once they have safely parked their bikes. This allows for better ventilation, relief from the weight and heat of the helmet, and an opportunity to relax momentarily.
Remember, these actions are subjective and can vary from rider to rider. It's always best to respect the choices and preferences of individual motorcyclists and not make assumptions based solely on the brand of their motorcycle.