The wobbling sensation experienced by professional motorcycle riders when leaning their bikes at extreme angles can be attributed to several factors, including the interaction between the tires and the road surface, the bike's suspension, and the rider's inputs.
One of the primary causes is known as "tank-slapping" or "head-shake." It occurs when the front wheel of the motorcycle starts oscillating rapidly from side to side. This phenomenon is typically triggered by imbalances or disturbances in the bike's geometry, weight distribution, or suspension setup. When the motorcycle is leaned over at extreme angles, the front wheel may experience irregular forces that can lead to oscillations and wobbling.
Various factors can contribute to tank-slapping, such as hitting bumps or irregularities on the road, aggressive acceleration or deceleration, improper suspension settings, worn-out or incorrectly inflated tires, or misalignment of the front forks. Additionally, rider inputs and weight distribution play a role in stabilizing the motorcycle. Small adjustments in body position, throttle control, or braking can affect the bike's balance and stability during extreme lean angles.
Professional riders undergo extensive training to develop the skills necessary to manage these situations. They learn to anticipate and react to the motorcycle's movements, adjusting their body position, and modulating their inputs to regain control and minimize the wobbling sensation.
It's worth noting that technological advancements in motorcycle design and engineering have led to improved stability and reduced wobbling tendencies in modern high-performance motorcycles. Suspension systems, frame geometry, and tire construction have evolved to enhance the overall stability and control of the bike, even when leaned over at extreme angles.