Harley-Davidson motorcycles are known for their distinctive engine design, which is often referred to as a "V-twin" engine. This type of engine has two cylinders arranged in a V shape, typically at a 45-degree angle. The shaking or vibration you may notice in Harley motors is a characteristic of this engine configuration and is often considered part of the Harley-Davidson experience.
There are a few reasons why Harley V-twin engines tend to shake more compared to other engine types:
Engine Design: The V-twin engine design inherently produces more vibration due to the angle of the cylinders. The reciprocating motion of the pistons creates uneven forces that contribute to the shaking sensation. Harley-Davidson has intentionally retained this design characteristic over the years to maintain the unique feel and sound associated with their motorcycles.
Large Displacement: Harley engines are generally designed with larger displacements, which means they have bigger pistons and longer strokes. This can amplify the vibration compared to smaller, high-revving engines found in some other motorcycles.
Mounting System: Harley-Davidson uses a rigid mounting system for their engines, which means the engine is directly connected to the frame without rubber isolation mounts. This rigid mounting transfers more of the engine's vibration to the rider and the bike, further contributing to the shaking sensation.
It's worth noting that over the years, Harley-Davidson has made efforts to reduce vibration and improve rider comfort. They have incorporated various engineering techniques and technologies, such as counterbalancers, rubber-mounted engine mounts, and improved suspension systems, to mitigate the effects of vibration. However, some degree of shaking or vibration is still present in Harley motors, as it is an integral part of their design philosophy and brand identity.