What s going on with a motorcycle idling fast and slow?

IdlingWhen it is fast and sometimes slow, it is unstable, first check whether the mixing ratio is wrongCarburetorsIf there is a blockage, you can carefully clean the carburetor to check whether the intake pipe is leaking, and whether the valve clearance is too small or not closed tightlySpark plugsAnd whether gasoline is bad or not, etc.

If the idle speed of the motorcycle becomes higher (faster) without adjustment, you should check whether there is a problem with the carburetor, throttle cable, throttle handle, etc., whether the carburetor is improperly debugged, and whether the air filter, valve, and intake pipe related to it are faulty.

Causes of motorcycle idling:

Causes of high idling:

Carburetor throttle.

The tension spring is weak and cannot completely close the throttle.

The throttle is loose or the throttle cable is stuck in the jacket.

Reed valve or crankcase leakage.

1) "Vehicle" means motor vehicle and non-motor vehicle.

2) "Motor vehicle" refers to a wheeled vehicle that is driven or towed by a power unit and driven on the road for personnel or for transporting goods and carrying out special engineering operations.

3) "Non-motorized vehicle" refers to a vehicle driven by human or animal power on the road.

and motorized wheelchairs and electric bicycles for the disabled that are driven by power units but are designed to meet the relevant national standards in terms of maximum speed, empty mass and dimensions.

and other means of transportation.

1. When it is fast and sometimes slow, it is the engine idle unstable.

2. Oil circuit: If the oil circuit is not smooth, clean the carburetor (idle oil channel, acceleration oil channel, acceleration piston, float chamber, float chamber oil inlet needle valve, etc.), adjust the idle mixture concentration, idle speed, float chamber oil level, etc.; The vacuum accelerator piston leaks air and replaces the accelerator piston.

3. Circuit: The ignition strength of the spark plug is not enough, and the spark plug or engine high-voltage line and high-voltage bag are replaced.

4. Air intake: There is an air leakage between the carburetor and the cylinder block, causing the mixture to be sometimes diluted, replace the gasket or apply sealant at the interface.

5. Blocked exhaust pipe: clean or replace the exhaust pipe.

The electrons are not in good contact.

I will come to you to solve this problem for you and help you solve your problems.

First of all, motorcycles, idling is unstable, this is due to the following reasons.

First, spark plugs.

There is too much carbon deposit, we can take the spark plug off and rub it with sandpaper a few times, which will make it work more smoothly.

Second, the oil circuit problem. The quality of the oil we add is not good, we have to clean the oil circuit, so that the motorcycle can run more smoothly, and the idle speed is stable.

Third, there is the problem of motorcycle throttle. Many of our motorcycles are hand throttle, at this time, there is a problem with the throttle cable, the motorcycle is unstable at idle, we replace the throttle cable, and it will be solved.

Combined, these three reasons are caused.

There are many reasons for high idling, it can be because the ambient temperature is too low, it can be because the throttle is opened too wide, or it can be caused by the intake valve is not tightly closed. After this happens, be sure to go to a professional repair agency to check the repair.

The throttle valve is known as the throat of the engine, and the throttle valve is used to control the amount of air intake into the engine.

The throttle valve is on the intake pipe of the engine.

When the throttle opening increases, the amount of air entering the engine increases, and the fuel supply system also increases the amount of fuel injected, so that the engine speed can increase.

As the throttle opening decreases, the amount of air entering the engine decreases, so the engine speed decreases.

If the throttle valve fails, it will cause the engine to idle abnormally.

If the throttle is damaged, simply replace it with a brand new one.

If the idle speed of the automaton is too high after starting the engine cold, it is normal, because the temperature is relatively low in winter, and the mixture is relatively thick when the engine is just started.

An over-concentrated mixture can start the engine better and can heat up quickly.

The lower the temperature of the engine, the better, the engine has a normal operating temperature range, and increasing the idle speed can allow the engine to heat up quickly.

Only when the temperature of the engine is in the normal operating temperature range, the engine has the highest efficiency and the strongest power.

1. You can use a screwdriver to slowly adjust the carburetion, and the idle speed at the lower end of the device can be sizzled to the best position.

Second, if it is still high, there may be the following reasons:

1. Clean the carburetor and check whether the oil needle is worn.

2. Whether the stroke of the throttle line is too short.

3. If there is no problem with the above, you should check whether the ignition system is on time, whether the spark plug gap is appropriate, whether the spark plug is broken, and the reason for the unstable idle speed of the motorcycle is as big as these problems.

3. The impact of the idle speed of the motorcycle on the car is too low or too high

Whether the engine and the engine are running well or not is one of the important indicators to measure the working performance of the engine. If the engine idles too high, it will increase fuel consumption, increase the engine operating temperature, accelerate the mushroom, and there will be a crash sound when changing gears. Poor engine idling can be divided into three situations: no engine idling, too high idle and unstable idling.

The engine has no idle, mostly due to the failure of the carburetor, followed by the leakage of the air intake system, which makes the mixture thinner and the airway blocked; The oil level in the carburetor float chamber is too low; Leaking carburetor intake valve or crankcase.

If the idle speed is unstable and the ignition is extinguished quickly, it means that the combustible mixture required by the engine in the idle speed is not immediately interrupted, but the proportion of the combustible mixture is quickly changed for some reason, resulting in the idle speed cannot be maintained. This problem can be solved by adjusting the carburetor oil idle adjustment screw.

The carburetor throttle spring is weak and cannot completely close the throttle, and the user can replace the carburetor throttle.

If the idle speed exceeds the specified range, if the maximum engine speed is 6000r min, the idle speed should be about 1300r min, and the idle speed is considered too high if the idle speed exceeds 1300r min. If the idle speed is too high, it will not only affect the driver's operation, but also increase fuel consumption and accelerate the damage of the transmission parts.

Check whether the throttle can be completely closed, that is, pull the throttle by hand to close it further, and the idle speed can be reduced. Check whether the spring and throttle cable are working properly, whether the throttle is loose, and adjust or replace new parts in time. In addition, it should be checked for air leakage in time.

What should I do if the idle speed of the motorcycle is high and low? Try this method of the master, and solve the problem simply and quickly.

1. The carburetor has been used for a long time to readjust the mixing ratio (the EFI machine ignores, because the EFI is electronically controlled) 2, the engine brake pads are worn 3, and the above two problems are seriously worn out of the transmission teeth in the engine case (this problem is not recommended to be repaired, because the maintenance cost is equal to the new engine).

Idle speed is based on the hot car as the standard, if the idle speed is basically normal when the car is cold, it will definitely become higher when the car is hot, that is to say, it should be adjusted to normal when the car is hot (that is, about 1200 1500 rpm), the idle speed is lower or the idle speed is unstable when the car is cold, and the idle speed can not be adjusted when the car is cold, otherwise it will appear too high when the car is hot.

Most cars have a slightly higher idle speed on a hot car than a cold car, but like yours, from 1200 liters to 1800, it's relatively rare, and I suspect your motorcycle carburetor is a bit thinner...

You can try readjusting the carburetor mix ratio and idle speed.

It is normal for the cold car to have many factors such as uneven engine lubrication oil (the oil pump has not been oiled yet), large friction, and low temperature in the cylinder. There is also the possibility that the throttle line is rusty, and the oil return is slow!

There are many reasons for a high idle speed, it can be because the ambient temperature is too low, it can be because the throttle is too wide, or it can be because the intake valve is not closed tightly. After this happens, be sure to go to a professional repair agency to check the repair.

The throttle valve is known as the throat of the engine and it is used to control the intake of the engine.

The throttle valve is on the intake pipe of the engine.

When the throttle opening is wider, the amount of air entering the engine increases, and the fuel supply system also increases the amount of fuel injected, which can increase the engine speed.

When the throttle opening is reduced, the amount of air entering the engine is also reduced, so the engine speed is reduced.

If the throttle fails, it can cause the engine to idle abnormally.

If the throttle is damaged, replace it with a brand new one.

If the automaton idling is too high after the engine is cold started, it is normal because the temperature is relatively low in winter, and the mixture is relatively thick when the engine is just started. Eggplant stool does.

An overly concentrated mixture will cause the engine to start better and will allow the engine to heat up quickly.

The lower the engine temperature, the better. The engine has a normal operating temperature range. Increasing the idle speed judging results in a rapid engine ramp up.

Only when the temperature of the engine is within the range of normal working temperature, can the engine have the highest efficiency and the strongest power.

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