Can't a motorcycle turn without leaning?

[PhoebeLee]

Human and vehicle form an integrated system where the resultant force of gravity, centrifugal force, centripetal force, traction, and braking must point within the area defined by the contact points between this system and the ground. Otherwise, there will be a tendency to rotate. Here is relevant information about motorcycle leaning during turns: 1. Centrifugal force: Additional centrifugal force during the process causes the resultant force to deflect outward, moving beyond the contact area between the vehicle and the ground. If the torque that causes the vehicle to flip acts for a sufficiently long time, the vehicle will flip over, resulting in the motorcycle riding the rider. The faster the turning speed and the sharper the turn, the greater the centrifugal force and the larger the deflection angle of the resultant force. 2. Tire profile: The crown of everyday motorcycle tires is an arc where the radius is greater than the tire's cross-section. This results in a limited lean angle that everyday tires can support. If a larger lean angle is necessary due to sharp turns or other reasons, it changes the motorcycle's center of gravity position and reduces the vehicle's lean angle.