How to adjust the carburetor mixing ratio of the scooter?

The method of adjusting the mixture: 1. First prop up the vehicle, and the air-fuel adjusting screw is rotated to the end in a clockwise direction, and then retreat 1 2 times.

2. Rotate the idle screw in the clockwise direction, and the spring under the idle screw shall prevail.

3. Start the engine, the speed will be very high, and the following details should be noted:

a. Slowly rotate the air-fuel adjusting screw in the counterclockwise direction, listen carefully to the speed, under normal circumstances, it should be higher, until the speed will no longer continue to rise after the counterclockwise rotation, (under normal circumstances, the reversal will not exceed about 3 turns, but this is only a relative value, depending on the condition of each person) That is to say, use your ears to hear the "top dead center" with the highest speed, and you can stop to rotate.

As for which direction to adjust whether it is concentrated or thin, it depends on whether the carburetor is plunger or vacuum membrane.

The plunger carburetor belongs to the gas regulation, so it is Shun Nong and Reverse Rare, Honda products, and most of the locomotives in China II.

The vacuum membrane carburetor belongs to oil blending, so it is diluted and concentrated. Honda products, the majority of the national three locomotives.

The mixture is too thick or too dilute will make the speed low, and the mixture must be suitable, and it cannot be artificially adjusted to be too thick or too thin. The vacuum membrane carburetor used in the scooter is smooth and thin, if the mixture screw is screwed to the end does not turn off and the idle speed will become high, indicating that the carburetor or other places are also faulty, otherwise it will definitely go out, it is recommended to find a better teacher to pay a thorough overhaul.

Start the car, then adjust the idle speed to fast stop but not turn off, then slowly turn the mixing screw until the idle speed rises to the highest point, make sure that point stops, then adjust the idle speed to the lowest, twist the mixing screw to let the idle speed be the highest and repeat it several times to find the best position, and finally adjust the idle speed to the specified value.

1. Carburetor composition: the upper part has an air inlet and a float chamber, the middle part has a throat, a measuring hole and a nozzle, and the lower part has a throttle. The float chamber is a rectangular container that stores gasoline from a gasoline pump, and a float inside the container controls the amount of fuel intake by using the height of the float (oil level).

One end of the nozzle is connected to the measuring hole of the float chamber, and the other end of the nozzle is at the throat of the throat.

2. The working principle of the carburetor: The carburetor is actually a tube, and there is an adjustable plate called the throttle plate in the middle of the tube, which is used to control the air flow through the tube. There is a shrinkage part in the tube called a venturi that creates a vacuum in this shrinkage section.

This shrink part has a measuring hole from which fuel can be sucked in using a vacuum.

Adjustment method of ordinary carburetor:

1.There is another screw next to the idle adjustment screw (some in other positions, such as the top of the vacuum carburetor connected to the engine end), tighten it to the tightest (this is the highest concentration, the engine idle is unstable).

2.After starting the engine, adjust the idle speed so that the engine can stabilize the idle speed normally.

3.At this time, adjust the mixture adjustment screw - gradually and slowly loosen it, while observing the idle speed change, until the highest speed at idle (be sure to adjust it when the engine is running). Note:

To adjust back and forth, when the idle speed rises too much during adjustment, a little lower idle speed can help to identify subtle changes in idle speed.

4.After adjustment, run idle for a few minutes, unscrew out the spark plug after turning off the ignition, and observe the cautery color: black - the mixing concentration is too high, yellow - the mixing concentration is appropriate, and white - the mixing concentration is too low.

5.It should be fine-tuned again according to the color of the spark plug, tightened to thicken, loosened and thinned.

Also note::

1.Each concentration has advantages and disadvantages. If the concentration is moderate, the cold car is easy to start, and the fuel consumption and power are better, but the top speed is not as high as that at higher concentration; When the concentration is high, the power is strong, the cold car starts and refuels is easy to stall, and the fuel consumption is high; When the concentration is low, it is the most fuel-efficient, but it is difficult to start in cold and the power is not good.

2.When adjusting, be sure to let the spark plug gap be at the best value specified by the manufacturer, otherwise it is difficult to adjust to the best state.

Hope to communicate more!

Summary. The mixing ratio of the scooter carburetor is adjusted by the mixing ratio adjustment screw, the carburetor is completely disassembled, and after cleaning, the mixing ratio screw is screwed to the end, and then the circle is rotated outward. After increasing the intake opening of the carburetor, start the car, at this time, there will be a situation that the idle speed is high, gradually reduce the intake opening, and the engine returns to the normal idle state, at this time, slowly adjust the mixing ratio screw, take 1 4 turns as the adjustment unit, first screw inward, the idle shake is obvious, and it is spun out outward, so that after the adjustment, the engine hot car idling is stable and no shaking, after the ignition, it can be started at a moment's notice, and the carburetor is cleaned every 10,000 kilometers or every two years.

The gasoline filter needs to be replaced before the carburetor can be cleaned. This ensures that the oil circuit is not clogged.

How to adjust the mixing ratio of scooter carburetor.

Hello, this question can give you a perfect reply, wait for me to sort out the information, I'm typing, 2-3 minutes, don't finish.

Mine is the Yayamaha Cruiser Pedal.

The mixing ratio of the scooter carburetor is adjusted by the mixing ratio adjustment screw, the carburetor is completely disassembled, and after cleaning, the mixing ratio screw is screwed to the end, and then the circle is rotated outward. After increasing the intake opening of the carburetor, start the car, at this time, there will be a situation that the idle speed is high, gradually reduce the intake opening, and the engine returns to the normal idle state, at this time, slowly adjust the mixing ratio screw, take 1 4 turns as the adjustment unit, first screw inward, the idle shake is obvious, and it is spun out outward, so that after the adjustment, the engine hot car idling is stable and no shaking, after the ignition, it can be started at a moment's notice, and the carburetor is cleaned every 10,000 kilometers or every two years. The gasoline filter needs to be replaced before the carburetor can be cleaned.

This ensures that the oil circuit is not clogged.

The method of adjusting the mixing ratio of the carburetor is as follows:

1. Check the tight connection of the connectors related to the carburetor to ensure that the carburetor suction is normal and there is no air leakage or suction blockage;

2. Rotate the carburetor mixing ratio screw clockwise to the end, then rotate the circle counterclockwise to start the engine, let the engine preheat for 10 minutes, so that the engine reaches the normal working temperature, adjust the idle adjustment screw of the carburetor, so that the engine speed is the lowest and can be kept inextinguished;

3. Repeatedly adjust the carburetor mixing ratio screws left and right to make the engine speed reach the highest. In this process, some friends will find that after the mixing ratio screw is adjusted to a certain position, and then rotate the mixing ratio screw in the counterclockwise direction, the idle speed will not change, and the mixing ratio screw can stay at the position when the idle speed is just adjusted to the maximum.

Hello First open the valve and timing the ignition with the T-shaped upward; It is enough to adjust the valve screws to leave an expansion interval; Cover the valve cover, start the engine and warm up for 3 minutes; Use the broken saw blade to twist the mixing ratio screw, twist in the direction of the high speed of the engine, twist to the highest, reduce the idle speed, and repeat the action just now until the engine running sound is stable, so that the mixing ratio is adjusted.

Adjust the carburetor mixing ratio of the motorcycle.

How to adjust the carburetor mixing ratio? Teach you a trick, and you can easily do it if you learn it.

The method of adjusting the mixing ratio of the carburetor: 1. First of all, the carburetor should be able to idle, most of the scooters have an electronic enrichment valve, and the idle speed is very high at the beginning, and the electronic enrichment valve works automatically;

2. After one or two minutes of ignition, the mixing ratio will not be adjusted well, the idle speed will be unstable, one will be higher and the lower speed will be low, and even the ignition will be turned off, most of the solutions are to adjust the idle speed high, and the mixing ratio will not appear at all, and the idle speed can be stable and not extinguished with a very low idle speed;

3. The adjustment is very simple, people who don't know anything will refer to the key adjustment, slowly and repeatedly rotate the mixing ratio screw, don't care whether it's smooth or reverse, don't care whether it's thick or thin, you can use a very low idle speed to adjust to a stable and non-extinguishing speed, even if the adjustment is good, it's as simple as that;

4. Which use it so much, it must be stable, if it is not stable, it is not adjusted, it is not adjusted, but it is not adjusted, and it will rush and rush, and even turn off, that is, the idle speed is unstable, one will be high, one will be low, slowly rotate the mixing ratio screw, find a stable value, it's as simple as that, it's good and bad, it's just a theory, just know it, don't care about it at all;

Millions of car purchase subsidies.

Adjust the scooter carburetor mix ratio by adjusting the valve oil needle, the specific operation is as follows.

Here's how.

When the color of the spark plug is whitish.

It means that the mixture is too thin, and the oil injection should be lowered by one grid and the mixing ratio should be increased. The color of the spark plug is black, indicating that the mixture is too thick, and the lead should be raised by one level of oil injection to dilute the mixture. Then it depends on the color of the spark plug, it should be about 5 kilometers at the speed of 4000 to 6000 rpm 40-60 kilometers per hour.

When the kilometer is up, immediately hang neutral, or grab the clutch, turn off the engine and stop to check. (Note that every time you adjust the height of the throttle valve oil needle, if the idle speed is unstable, you should adjust the idle speed and the mixture screw from the beginning).

When the fuel consumption is too high.

The throttle valve oil needle should be adjusted, not the mixing ratio screw. Up one or two can effectively control fuel consumption, but there will be insufficient power, slow acceleration, high-speed and other phenomena, on my own experience spark plug burned brick red low-speed power is really general, for the city driving in the car low-speed acceleration is too important, so my car is tuned to dark red, so that there will be abundant power output at low and high speeds, and then in fact, as long as the spark plug burns well, there is no need to care too much about fuel consumption, The superdilute mixture will cause the combustion rate of the engine fuel to be reduced, the engine will overheat, and the power output will be reduced.

When the idle speed is unstable.

The gas mixture screws and idle screws should be adjusted. The method is: first tighten the idle screw, in order to stabilize the flame does not go out, and then adjust the mixture screw, clockwise to thick, counterclockwise to diluted, rotate left and right, pay attention to observe the idle speed until the highest point, and then adjust the idle screw to about 1500, and then rotate the mixture screw in a small range to the highest point of idle speed, and then adjust the idle screw back to about 1500 rpm, and so on several times, until the idle speed of the left and right rotating mixed gas screw no longer changes.

Note: The conditioning mixture should be adjusted after 3-5 minutes of warm-up.

The power difference is high speed, and it is all for a while.

It is obvious that the mixture is too thin and the height of the oil needle should be adjusted according to method 1.

Difficult to start, when black smoke is emitted after starting.

It is a sign that the mixture is too thick, and the oil needle should be adjusted by one level, and the idle mixture should be carefully adjusted according to method 3.

The following is a specific method to check whether the mixing ratio of the carburetor of the motorcycle is normal for the first certificate: 1. Start the engine, keep the idle running, and after the electronic concentration 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.

2. If the negative pressure tube is unplugged and the engine is turned off immediately, it means that the mixture under idle condition is too thin, because the air enters the cylinder through the negative pressure pipe interface, which makes the combustible mixture thinner, and the combustible mixture is difficult to burn and stall. If the idle speed of the negative pressure pipe is unstable and does not turn off immediately, it means that the idle mixture is basically normal.

3. Judging by the color of the central electrode of the spark plug, you can roughly see whether the carburetor mixing ratio is too thin or too thick. Normally, the center of the electrode should be brick red. If the spark plug is white, it means that the wheel pin mixture is thin, and if it is black, it means that the mixing ratio is too thick.

Millions of car purchase subsidies.