What is the best technique for stopping quickly while turning or in a curve?

The best technique for stopping quickly while turning or in a curve is to straighten the motorcycle and apply brakes smoothly. When maneuvering through a turn, maintaining control is crucial, and straightening the motorcycle allows for better traction and stability. When the bike is upright, the contact patch of the tires increases, which provides more grip, and applying the brakes smoothly helps to prevent skidding or losing control.

It's important to avoid abrupt braking while leaning into a turn, as this could cause the motorcycle to lose grip and possibly lead to a crash. Using only the rear brake while in a curve can also lead to the risk of skidding. Therefore, the most effective and safest approach is to first straighten the bike, ensuring maximum control before applying the brakes.