Motorcycle carburetor mixture adjustment problem, experts come in!

At present, in domestic small-displacement motorcycles on the market, two-stroke motorcycles, lower cylinders and carburetors with a displacement below 125CC generally adjust the air intake, which is characterized by screwing in the mixed gas screw clockwise to make the mixed gas thick, and most of the mixed gas screws of scooters and various vehicles with 125CC are adjusted, which is characterized by screwing out counterclockwise to make the mixed gas thick. If we want to judge according to the carburetor, we need to decompose the carburetor and compare its air intake and oil intake channels to judge. It's complicated and difficult to explain clearly in words. According to different production years, Yang Guang's carburetor has different basic models. The carburetor with pump should be an earlier product. After 2000, in order to reduce the cost, it was basically changed to one without accelerating pump. If there is no accelerating pump, the mixing adjustment method is different from that with pump. That is, the mixer screw is screwed inward to thicken the mixture (this carburetor is generally marked as KYMC0, and its mixer adjusting screw is on the left side of the carburetor, so the mixture is thinner. When the weather is cold, it is necessary to screw the mixture screw in more. If you have a Keihin carburetor with an acceleration pump, the mixture screw should be in front of the lower part of the carburetor. Generally speaking, the screw should be turned inward to the end, and then pulled out about one and a half turns. Then through the idle speed adjustment, the idle speed can be stabilized, the acceleration is smooth, and the mixed gas screw can be pulled out at most.