How to adjust the mixing ratio of motorcycle carburetor? 48cc high finger teach

The mixer adjustment screw should know the state of the hot car Tighten the screw to the end **2 turns --- 3 turns You feel the working state of the engine You can adjust the idle speed a little higher At this time, adjust the mixer screws The idle speed of the car has changed Slowly adjust the mixer screws Let the idle speed of the engine be the highest position, at this time it is the best working state of the carburetor, and then adjust the idle screw.

Your engine doesn't work well.

Adjust the idle speed to about 1500 in the hot car state, and I feel that I can distinguish the idle speed from high to low, and then turn the mixing ratio screw back and forth, and feel that the engine speed is in the highest and most stable position, and then adjust the idle speed to normal to complete.

Black smoke is due to the concentration of the mixture.

Adjustable stuff a lot:

First of all, the oil level height is the most important parameter, which affects the idle speed and normal driving, and the specific adjustment to how much should be subject to the parameters in the manual.

The higher the oil level, the higher the concentration of the mixture, and you can also adjust it slowly by yourself.

The height of the oil needle is also an important parameter to increase the concentration of the oil needle mixture.

Idle speed adjustment Idle air screws (generally loosen one and a half times after being screwed to the bottom) Throttle control screws require two fits to adjust to the optimal state.

There is a screw, which is very special, when the engine temperature is normal, the wrong screw is screwed back, it's okay, it's bold, it can't be broken.

The carburetor of the 125 motorcycle also has different models, and their mixing ratio screw adjustment direction and number of turns are also different, even if the same model of carburetor will have individual differences, and the number of adjustment turns of its mixing ratio screw is not the same.

Generally, in addition to the carburetor used in some horizontal cylinder bending beam motorcycles, the carburetor of other straddle 125 motorcycles, whether it is a plunger carburetor or a vacuum membrane carburetor, its mixing ratio screws are basically tightened clockwise to dilute and counterclockwise to withdraw from the concentration, and the number of adjustment turns of the mixed gas screws is mostly screwed clockwise to the end, and then counterclockwise to withdraw between two and a half circles, of course, there are individual exceptions, which need to be adjusted in combination with the actual situation.

If it is a 125 curved beam motorcycle with a horizontal cylinder, their mixture screws are generally screwed in clockwise to concentrate and counterclockwise to be thinned, and most of them are to screw the mixture screws clockwise to the end, and then exit counterclockwise for about one and a half turns.

There are many kinds of 125 motorcycles, their carburetors are different, the adjustment direction and number of turns of the mixing ratio screw are not the same, and even if it is the same brand and model of the car, specific to each car, the number of adjustment laps is not necessarily the same, generally speaking, the mixing ratio has been adjusted when leaving the factory, and there is no special situation that does not need to be adjusted. If there is a problem that really needs to be adjusted, it needs to be carried out by after-sales or professional maintenance experience repair personnel, combined with the actual car condition. If it is a straddle 125 motorcycle, the adjustment direction of the mixing ratio screw is mostly clockwise twisted to dilute and counterclockwise to thicken, generally after the mixing ratio screw is screwed clockwise to the end, and then counterclockwise to exit two to two and a half turns.

The simple adjustment is to listen to the idle speed, that is, the lowest throttle is adjusted to the highest engine speed, if you want to be more accurate, you should run for a period of time to remove the spark plug to see the color, if it is blackened, it is insufficient air intake, the mixer is too thick, brown is normal, whitish is too much air intake.

Check the library or documents online, enter the specific motorcycle brand and model, find the carburetor adjustment instructions for this car, adjust it as required, do not blindly adjust, otherwise it will not be easy to use, there is also a various types of carburetor adjustment data on the Internet**, you can look for it.

According to the actual situation, judge whether to adjust the general mixing ratio has been pre-adjusted when leaving the factory, and only need to adjust the idle speed.

The carburetor is a relatively delicate part of the motorcycle, which directly affects the working condition of the motorcycle. In the case of the GY6-125 scooter carburetor, when we suspect that the carburetor mixture is not normal, we can verify it like this.

Start the engine, keep idling running, after the electronic enrichment valve is completely closed, pull out the negative pressure pipe from the engine intake manifold, and let the air enter the cylinder from the negative pressure pipe interface of the intake manifold.

This is because the air enters the cylinder from the negative pressure pipe interface, which dilutes the overly concentrated mixture, and the combustible mixture is fully combusted, so the engine idle speed increases.