What percentage of a motorcycle's total stopping power is supplied by the front brake?

The correct choice indicates that about three-quarters of a motorcycle's total stopping power is supplied by the front brake. This is due to the dynamics of braking on two-wheeled vehicles. When a motorcycle comes to a stop, weight shifts forward due to inertia. This forward weight transfer increases the traction available to the front wheel, allowing the front brake to provide a significantly greater proportion of the stopping power compared to the rear brake.

While the rear brake does contribute to stopping, its effectiveness is limited because it does not benefit as much from the weight shift as the front brake does. Riders are trained to utilize both brakes effectively, but relying primarily on the front brake allows for safer and more efficient stopping. Understanding this distribution of stopping power is crucial for safe riding practices, particularly in emergency situations where maximum braking is necessary.