What's wrong with the hot eyes from motorcycle exhaust?

The problem that exhaust gas burns eyes is mostly caused by too much mixed gas. Check whether the filter is too dirty and clean the carburetor. The air hole in the main metering hole or idle metering hole of carburetor is blocked, which will cause the mixture to be too rich. In addition, check whether the oil level of carburetor is too high. Too high will cause the mixture to be too rich. The oil level inspection method is to prop up the car, lift the oil drain pipe below the carburetor to a height higher than the upper and lower joint of the carburetor, then loosen the oil screw and slowly move the oil drain pipe downward. When the gasoline flows out, it is the plane of the oil level inside the carburetor, and the standard height of the oil level is about 1-3 cm below the upper and lower joint of the carburetor. If it is too high, remove the carburetor and break the oil float a little. If it really doesn't work, move the oil needle on the carburetor plunger up a slot so that the oil needle can protrude a little. The carburetor may be too thin. Adjusting the concentration of mixed gas can basically solve the problem. Try turning the mixed gas screw counterclockwise by half a turn. If not, you can also transfer it out once. However, it is best for an experienced person to adjust the carburetor. It is best not to adjust the carburetor or replace the oil needle and nozzle. Not only is it impossible to solve the problem of speeding up, but it is also likely to greatly increase fuel consumption. In this case, the merchant will not change the carburetor for you, even if it is changed, it will be useless. The acceleration of a car is more determined by the design and manufacturing level, and the adjustment can play little role.