Many motorcyclists encourage the heavy use of rear brakes, and in fact, we can see many cases of unusual heavy use in safety driving competitions. However, from a physical standpoint, using the rear brake in both straight lines and turns is not only inefficient but also unsafe.
The "grip" of a tire depends on the amount of "load" applied to the tire's contact surface. The amount of "load" is not only determined by the weight of the vehicle and rider, but also by acceleration and deceleration, which can further increase the "load". But, shaking the vehicle or moving the vehicle up and down will greatly reduce the "load," and the "grip" of the tire will be greatly spoiled.
In other words, if you want to maintain a large "grip" of the tires and move the motorcycle as you wish, it is important to pay attention not to sway the motorcycle body from side to side or move it up and down unnecessarily. The following video will help you understand the importance of controlling the swaying and up-and-down movement of the motorcycle body.
"Rear turning" is a rear tire-driven turning phenomenon that occurs naturally simply by accelerating while the motorcycle is leaned. Therefore, most riders do not pay much attention to this phenomenon, but in order to make effective use of rear turning, it is most important to be aware of and control the "load".
In addition to acceleration and deceleration, "load" is also generated by turning maneuvers. In order to efficiently utilize this "load" to generate "turning moment," it is necessary to control the vehicle without reducing the load by shaking the body.
This video introduces the "basic practice" to improve this control technique and realize turning by utilizing the "turning moment".