If you stop a motorcycle using only the front brake, without applying any rear brake or downshifting, it can lead to a phenomenon called "front wheel lock-up" or "front end washout." This occurs when excessive braking force is applied to the front wheel, causing it to lose traction with the road surface.
When the front wheel locks up, the motorcycle's stability and ability to steer are compromised. The bike may skid forward in a straight line, and the rider can lose control, potentially resulting in a fall or collision. It is important to note that modern motorcycles are typically equipped with anti-lock braking systems (ABS), which help prevent wheel lock-up by modulating the braking force.
To effectively stop a motorcycle, it is generally recommended to use both the front and rear brakes together. The front brake provides the majority of the stopping power, as weight transfers to the front of the motorcycle during braking, increasing traction on the front wheel. However, using the rear brake in conjunction with the front brake helps to maintain stability and balance the braking forces.
Experienced motorcyclists often practice using both brakes simultaneously while gradually increasing the brake pressure to avoid abrupt and excessive braking. Developing proper braking technique is crucial for safe and controlled stopping.