125 how to adjust the mixture of motorcycle carburetor? Thank you.

There are two adjustable screws, one is the throttle adjusting screw. Screw it in to increase the throttle and loosen it. Another scientific name is the idle auxiliary nozzle adjusting screw, which reduces the fuel injection and increases the looseness.

The principle of mixture adjustment of motorcycle carburetor is to adjust the concentration of mixture by screwing in the adjusting screw or adjusting the intake air volume. After adjustment, less air enters the engine and the mixture is thicker, but when the engine is running, the mixture will become thinner. Mixing ratio adjusting screws are mostly straight threads, that is, they are tightened clockwise and counterclockwise. Then, if the mixing ratio becomes smaller, which is what you call thinning (the mixing ratio can only be expressed by size, and the mixed gas can be said to be thick or thin), just unscrew the adjusting screw of the mixed gas counterclockwise.