Some riders' motorcycles, after starting, during the acceleration process, as the throttle opens, the engine speed fluctuates greatly, and there is a sudden feeling, or as the throttle increases, the engine not only does not increase the speed, but instead The trend of flameout. If your motorcycle has this phenomenon, then keep looking down.

If the above phenomenon occurs, the oil circuit and the circuit are possible. Today we will discuss the cause of this phenomenon if there is a problem with the carburetor.

During the acceleration of the motorcycle from the start to the normal driving, for the carburetor, the internal working process is actually a phase in which the idle oil supply gradually decreases and the main oil supply increases continuously. At this stage, the industry calls it the transition phase of carburetor work. In order to make the oil supply between the idle oil system and the main oil system smooth, a transitional oil system is set up to ensure the smoothness of the motorcycle starting process.

So, if this happens, what is the general cause? What is the elimination method?

There are usually three possible reasons:

First, the relevant volume hole or oil circuit is partially blocked

Reason: Due to the partial blockage of the relevant oil passages such as the idle speed hole, the idle speed oil passage, the main volume hole and the transition hole, the oil supply of the carburetor related oil system is sparse, causing a poor transition.

Remedy: Decompose and thoroughly clean the carburetor.

Second, the main volume of the foam tube is blocked

Reason: The function of the carburetor foam tube is to promote the mixing of gasoline and air. After the foam hole on the foam tube is blocked by impurities, the mixing effect of gasoline and air is reduced, and the atomization quality is lowered, causing poor transition.

Remedy: Decompose and thoroughly clean the carburetor.

Third, improper adjustment of idle speed

Reason: During the transition, the carburetor oil supply mainly comes from the idle oil system. If the idle speed is improperly adjusted, it will affect the transition performance.

Remedy: Adjust the idle adjustment screw to ensure normal operation. The specific method is: first fix the plunger to the engine speed of the hoisting normal idle speed, rotate the idle speed adjusting screw left and right, find the maximum speed when the plunger position, slightly adjust the plunger adjusting screw, and reduce the engine speed. The maximum speed, so repeated, until the maximum speed of a certain plunger position is equal to the standard idle speed of the vehicle.

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