How to adjust the carburetor of ZTE motorcycle 1 10-9?

Zte 1 10-9 is the next edition. The adjustment of this carburetor is mainly the adjustment of mixture and idle speed. First, warm up the engine, then screw the mixture screw to the bottom, then draw it out for one and a half turns, then stabilize the idle speed, then turn the mixture screw left and right to the highest idle speed, and then adjust the idle speed to normal (the normal standard idle speed is 1500 rpm 65438+. The standard of its air mixing screw is to screw it to the end and then turn it out 1-3/4. You can also judge whether the mixture is normal by the color of the spark plug. The spark plug is burned. It should be reddish brown, similar to the color of red brick. Black indicates that the mixture is too thick, and white indicates that the mixture is too thin. Too high carburetor oil level will also make the mixture too rich. Generally speaking, the carburetor oil level should be about 65438 0 cm from the top of the float chamber. If there is a special altimeter for measuring the float, the height of the float should be 20 mm, and the oil needle of the carburetor throttle valve will also affect the mixture. The oil needle clamp spring generally has five squares, and the clamp is generally set in the middle position when leaving the factory. If the mixture is too thin or too rich, it can be solved by adjusting the position of the oil needle. When the clamp spring moves upward, the position of the oil needle will be lowered and the mixture will be diluted. When the clamp spring moves down, the position of the oil needle will rise and the mixture will become thicker. Idle speed should not be too low, as long as it can catch fire, the lower the better. Too low idle speed will make the engine run unsteadily, and the oil pump will supply less oil, which will affect lubrication and aggravate parts wear.