The perception that old Harley-Davidson bikes are rough can stem from several factors:
Design and Engineering: Older Harley-Davidson motorcycles were built with different design principles and engineering techniques compared to modern motorcycles. They often featured rigid frames, hardtail suspension (no rear suspension), and solid-mounted engines. These design elements, while contributing to the iconic Harley aesthetic, can result in a rougher ride compared to bikes with more advanced suspension and frame technologies.
Vibration: Harley-Davidson motorcycles, especially older models, are known for their distinct engine vibration. This vibration can transmit through the bike's frame and components, resulting in a rougher ride compared to motorcycles with smoother-running engines.
Maintenance and Wear: As motorcycles age, regular maintenance becomes crucial to ensure optimal performance and ride quality. Neglected or poorly maintained older Harley-Davidsons may exhibit roughness due to worn-out components, inadequate lubrication, or other mechanical issues.
Personal Preference: The perception of a "rough" ride can vary from person to person. Some riders may appreciate the raw and authentic feel of an older Harley-Davidson motorcycle, finding the roughness part of its charm and character. Others may prefer the smoother and more refined ride of modern motorcycles.
It's important to note that not all old Harley-Davidson bikes are inherently rough. Well-maintained and properly restored vintage models can offer a smooth and enjoyable riding experience. Additionally, newer Harley-Davidson motorcycles have undergone significant advancements in technology, resulting in improved ride quality, comfort, and performance.