After traveling over 1500 kilometers, the New Dazhou 125 (Honda King CG machine) motorcycle was unable to start on a harsh winter morning. The after-sales maintenance personnel blindly repaired for most of the time, but could not eliminate the fault. Under the guidance of experts, it was identified as poor exhaust.

Muffler refers to an airflow duct with noise propagation, which can use pipes and elbows with sound-absorbing lining, or pipes with sudden changes in cross-sectional area and other sound resistance discontinuities to attenuate or reflect noise inside the duct.

In addition to the aforementioned proof documents, a visual inspection should also be conducted. The surface of the board should be flat, with uniform thickness, no protrusions or obvious pressure marks, no cracks, delamination, pitting, or corrosion. Steel sections should be equal and free of defects such as cracks, scratches, and pitting that affect quality.

A motorcycle muffler is a device that controls engine exhaust noise, and its function will have a significant impact on the environment. Its function is to allow airflow to pass through normally and reduce radiated noise energy.

A motorcycle muffler is a device that allows airflow to pass through and reduces noise, and is one of the important components of a motorcycle. The performance of a muffler not only affects the noise of a motorcycle, but also has a significant impact on the power, fuel consumption, torque, and other performance of the engine. Therefore, it is necessary for every motorcycle user to understand the noise reduction principle, structural types, and maintenance knowledge of motorcycle mufflers.

Taking advantage of the quiet night, a killer walked into the intensive care unit of the hospital. He held a wide mouthed plastic bottle in his left hand; Holding a handgun in his right hand, he wrapped the barrel in a towel. The dying patient on the hospital bed is unconscious.