When my motorcycle started, the idle speed was normal. What is the reason why high-speed deceleration is easy to stall?

1. Why are some motorcycles difficult to start in rainy days? Y

Some motorcycles have difficulty in cold starting in summer, especially in rainy days. After starting, the engine is unstable, easy to turn off, with symptoms of insufficient combustion, weak driving after starting, and the engine runs normally after driving for a period of time. ~}yF

If this happens, the spark plug should be removed for flashover test. If the spark is strong, the ignition system is normal. Carefully check whether there are any tiny cracks in the spark plug cap. At this time, put the spark plug cap loosely on the spark plug. If the engine is easy to start when the cold car is started, and there is a strong spark jumping sound between the spark plug caps, it means that there are tiny cracks in the spark plug caps, which will cause breakdown when the cold car is started in wet summer and rainy weather, leading to the failure of the spark plug. When the engine warms up, the air around the spark plug cap becomes relatively dry and the insulation resistance increases due to the heat emitted by the engine itself. At this time, the high pressure can not penetrate the air in the gap, and the engine returns to normal operation. ; =

Second, what is the reason for the motorcycle to automatically slow down and turn off during driving? How to rule it out? $q#LK

When the motorcycle is running, it will slow down gradually and the engine will turn off automatically. Before turning off the engine, it was obvious that the engine was weak. Generally speaking, the fuel supply system is out of order. At this time, check whether the fuel in the fuel tank is used up. If there is enough fuel, check whether the fuel switch is turned on, and then unplug the oil pipe to check whether there is fuel supply. If there is no oil supply, it means that the carburetor oil circuit is blocked and should be unblocked. G2q4

The simple way to remove the fault is to turn the switch to the off position, then remove the oil pipe connected to the oil tank switch, and then blow the oil pipe with your mouth (or inflate it with a pump). After the impact of compressed air, the blocked oil circuit in the carburetor may be unblocked. If the oil circuit is still blocked, it means that the oil circuit is seriously blocked, and the carburetor should be removed and thoroughly cleaned. +=j(

If the engine makes a loud "snapping" sound when the engine is turned off, it can't be started after the engine is turned off, and the compression force is very small when the starting lever is stepped on, it can be concluded that the cylinder head gasket has been burned through or the crankcase oil seal is damaged. Four-stroke engine should also consider factors such as valve burning, air leakage and valve tappet bending. The valve cover and air cushion can be removed for inspection. If the cylinder gasket is worn, it should be replaced with a new one. If the cylinder gasket is not damaged, check whether the crankcase oil seal is damaged. Remove the parts outside the crankcase oil seal and take out the oil seal for inspection. If the oil seal is damaged, please replace it with a new one. Mikzl

Third, how to adjust the oil pump flow of separation lubrication+3; = 1

The flow of the oil pump should match the opening of the carburetor throttle valve. If the supply of lubricating oil is too large, the combustion is insufficient, the muffler emits black smoke, which makes it difficult to start, and the spark plug is easy to deposit carbon. If the supply of lubricating oil is too small, the engine will overheat, the wear will increase, and even the cylinder will expand. It can be seen that it is very important to synchronize the flow of oil pump with the supply of gasoline. Generally, the oil pump flow should be adjusted once every 6000 kilometers. The oil pump flow is controlled by the control cable. By adjusting the length of the cable, the flow of the oil pump can be changed. /K})Hl

The adjustment sequence is as follows: m

1. Remove the carburetor inspection cover, engine sprocket cover and oil pump cover; /

2. Turn the throttle handle inward to the end to make the throttle fully open, align the scale line on the throttle with the highest point on the circumference of the carburetor air inlet, and keep the throttle at this position; Yengham

3. Loosen the lock nut on the cable sheath and tighten the adjusting stud, so that the mark on the control rod is aligned with the mark on the pump body; {

4. Check again. If there is no abnormality, finally tighten the lock nut. Coronary heart disease intensive care unit

Four. What does the maintenance adjustment of clutch include? dbD

The maintenance and adjustment of clutch mainly includes the inspection of clutch engagement and disengagement, the adjustment of free stroke of clutch handle, the adjustment of spring force, the cleaning of clutch friction plate and the lubrication of bearing. L

The newly manufactured motorcycle clutch has been adjusted. After a period of use, the clutch will not completely separate or slip due to the elongation of the control cable, the normal wear of the clutch friction plate and the looseness of the adjusting bolt. PumB

The characteristics of incomplete clutch separation are that when the motorcycle starts, the clutch handle is not loosened and the vehicle moves forward; When shifting gears, the clutch grip has been clenched, but there is still a sense of gear collapse, making shifting difficult; When braking, although the clutch grip has been tightened, it will still cause the engine to stall. L]fd "

Clutch slip is characterized by poor acceleration performance when motorcycle starts or shifts gears; When going uphill, the vehicle is not firm; When driving, the speed is not high. If the above characteristics appear, the road test method should be used to further judge whether the clutch slips. During the road test, put the motorcycle into low gear, drive at the speed of 15km, brake slowly and refuel, and listen to the engine running sound. If the sound changes, the clutch is well engaged; If the sound does not change obviously, it means that the clutch is slipping or has poor contact, and it should be adjusted in time. | DX & ltX

5. Why is the motorcycle's fuel tank above the engine? What's the hole in the tank cover for? 9B[KzL

Motorcycle engines generally use gravity fuel supply, that is, the fuel in the fuel tank flows into the carburetor by its own weight. There is a small vent hole on the motorcycle fuel tank cover to keep the inside of the fuel tank connected with the outside atmosphere. If there is no small vent hole in the tank cover, then the tank is a completely closed container. When the fuel level drops after fuel consumption, a vacuum will be formed in the fuel tank, which will prevent the fuel from flowing out normally and affect the normal fuel supply of the engine. If the small vent hole on the fuel tank cover is blocked, it should be opened in time, otherwise it will affect the normal operation of the engine. , I

Some motorcycles also put the fuel tank under the engine for structural needs. In this case, a gasoline pump must be installed to supply oil to the engine, and the gasoline pump is driven by the engine. Similarly, the small hole in the tank cover is also indispensable. & lt

6. What is the reason why the battery can't be charged? How to diagnose? X3

Whether the battery is charged or not refers to that the battery is charged for a long time and the voltage rises slowly when the engine works normally. The reasons are as follows: B0*

1. Loose or rusty terminals in the charging circuit will increase the resistance and reduce the current intensity. ^#

2. Sulfide the battery plate, so that a layer of white aluminum sulfate particles with poor conductivity is attached to its surface. After the coarse particles block the pores of the plate, the electrolyte is difficult to penetrate, which leads to the increase of internal resistance and the inability of current to pass through. (Ci

3. The battery panel is damaged due to heavy current charging and discharging, excessive electrolyte specific gravity or insufficient liquid level. 5B & gt8n3

When diagnosing, first check whether each terminal is loose or corroded, and then judge whether the electrode plate is vulcanized according to the phenomenon during charging. If the electrolyte temperature rises rapidly during charging, or the charging time is not long, a large number of bubbles are generated in the electrolyte, but the voltage does not rise and the specific gravity of the electrolyte does not increase, indicating that the electrode sheet has been vulcanized. When the vulcanization is not serious, pour out all the electrolyte, inject distilled water, and then charge aluminum sulfate with a small current of about 2 amps for a long time, but be careful not to let the battery temperature rise. When the specific gravity of the electrolyte does not increase within several hours, it indicates that the battery is fully charged before discharge. After repeated charge and discharge cycles, if the active substance is still abnormal, the electrode sheet should be replaced. }0fa5

How does the caliper brake device (disc brake) work? V^n！ "b

At present, more and more motorcycles use butterfly braking, especially front braking. The caliper brake device consists of hydraulic oil control caliper and brake disc. The brake caliper and the front fork guide tube are fixed together and are the fixed parts of the braking device. The brake disc is fixed with the wheel and rotates with the wheel, which is the rotating part of the braking device. One end of the hydraulic oil pipe is connected to the oil cylinder on the brake caliper, and the other end is connected to the plunger valve on the handlebar, and it is filled with hydraulic oil. The brake caliper consists of two cylinders, and the front end of each cylinder is provided with a square friction plate. When the brake pedal is depressed (or the hand brake handle is clenched), the plunger valve acts to push the hydraulic oil to flow into the two cylinders of the brake caliper along the hydraulic oil pipe. Under the action of pressure oil, the oil cylinder pushes the friction plate close to the brake disc, so that the friction plates on both sides are completely attached to the two end faces of the brake disc until the brake disc is clamped, which produces huge friction resistance and forces the wheel to stop rotating, thus achieving the purpose of stopping or slowing down. When the brake pedal (or manual brake handle) is released, the pressure in the oil circuit quickly drops to zero, and the oil cylinder drives the friction plate to return to its original position to release the brake. g & gt6.& lt

The braking torque of the caliper brake device is not only related to the cylinder pressure, but also related to the diameter of the brake disc. By selecting brake discs with different diameters, the braking torque of front and rear wheels can be balanced and the best braking effect can be achieved. +-c？ three

Eight, how to clean the fuel tank? V+[Cb

Motorcycle fuel tank is formed by stamping and roll welding of thin steel plate. In order to prevent the corrosion of gasoline, the inner surface of the fuel tank is sandblasted, phosphatized or glazed. The top surface of the oil tank is provided with an oil filler, and the oil filler is provided with an oil tank cover with a rubber band. A small vent hole is drilled on the tank cover to keep the inside of the tank connected with the atmosphere. Clear (short for clear)

0? 8 Jianghan Forum-Jianghan Forum bbs.jttx.com.cn, let us stand higher, see farther and do better. ...

Clean the fuel tank of the motorcycle every 5000-6000 km. When cleaning the fuel tank, pay attention to the following items.

1. When cleaning the fuel tank, the fuel tank must be removed. First, unscrew the fixing bolts of the fuel tank, unload the fuel tank, then install a small amount of gasoline, and move the fuel tank up and down for impact cleaning. If the inner wall of the oil tank has rusted, a small amount of iron ore or waste nuts can be put in and repeatedly impacted, and finally washed with gasoline several times until it is clean. 1h*h

2. If there is oil leakage or oil leakage in the oil tank, it can be repaired by gas welding or tin welding. Before welding repair, wash the oil tank with boiling water for many times, dry it, and then weld repair. Otherwise, the residual gasoline in the fuel tank will burn due to the high temperature of welding repair, which will lead to the explosion of the fuel tank and cause an accident. %MD

3. The fuel tank switch should be disassembled for cleaning, and the dirt on the filter screen should be cleaned with a brush. Never wipe the parts of the fuel tank switch and the inner wall of the fuel tank with cotton yarn to avoid blocking the carburetor. z

4. The hole on the box cover should be kept clear, and it should be connected if it is blocked. The rubber gasket on the tank cover should be kept intact. If it is damaged, it can be prepared with oil-resistant rubber.

Choose a fuel-efficient motorcycle.

When buying a motorcycle, we should comprehensively consider all the indicators of the motorcycle, such as what kind of road the motorcycle is driving on, its maximum speed, acceleration, weight, fuel consumption and so on. When there are special requirements for the fuel quantity index, there should also be friendly requirements for other indexes to achieve the fuel economy and a certain level of performance index of the purchased car. So what kind of motorcycle saves fuel and mud?

1, motorcycles with two-stroke engines are more fuel efficient than motorcycles with four-stroke engines. This is because the scavenging process and exhaust process of two-stroke engine always end in an instant, and the scavenging hole and exhaust hole are opened at the same time. At this time, it is inevitable that a fresh gas will flow out of the exhaust hole because of short circuit, so that some fuel will be lost without burning, and fuel consumption will increase.

2. The smaller the engine displacement, the more fuel-efficient.

3. Reed valve rotary valve two-stroke engine is more fuel-efficient than piston valve engine. This is because both the reed valve and the rotary valve increase the intake phase angle, which makes the intake more sufficient, and at the same time, it also prevents the back injection of gas, which has a more obvious impact on the speed. Most new motorcycles adopt these two air intake modes, such as Yamaha RZ 125 with reed valve and Suzuki A 100 with rotary valve.

Replacement parts should be replaced in time.

When a motorcycle is used for a long time, there will be a big gap between the piston and the cylinder. If the cylinder is not lined and the piston is replaced in time to narrow this gap, air leakage will occur and fuel consumption will rise sharply.

How to judge whether your motorcycle should be crossed? When the fuel consumption is greatly increased and there is knocking sound in the cylinder during use, check the cylinder, remove it and touch the upper half of the cylinder by hand. If there are obvious wear edges, or the gap between the cylinder position and the piston skirt measured by the cylinder gauge is greater than 0. 15 mm, the cylinder must be lined and the piston must be replaced. Generally, the cylinder can be lined for three times, and a new cylinder must be replaced if it is worn again.

The motorcycle has been used for a long time, and the gap between various parts becomes very large, which will produce a lot of redundant energy consumption and increase fuel consumption. At this time, it must be overhauled. Generally, the overhaul mileage of two-wheeled motorcycles is over 6,543,800 kilometers, and that of three-wheeled motorcycles is over 50,000 kilometers. Motorcycles that cannot be overhauled should be updated in time to ensure a good fuel-saving record.

Save fuel during maintenance.

Motorcycles must have good ignition performance, and the spark plug must have enough sparks. Generally, the spark should be white, or further check whether there is any problem with the high-voltage coil, platinum and capacitor.

The air filter should be cleaned frequently to keep it open. At present, motorcycles mostly use paper core air filters. Every 4000 kilometers, the filter element must be blown by compressed air or air pump, so that enough air can enter the cylinder to participate in combustion. Air leakage in intake valve and exhaust valve.

If the intake and exhaust valve or the intake and exhaust valve seat is worn, it should be repaired or replaced in time. After repair or replacement, air leakage must be checked. When checking, turn the cylinder head upside down and pour gasoline. There is no leakage in five minutes. Piston ring opening clearance should not be greater than 0.5 mm, otherwise it should be replaced in time.

Carburetors should be in good oil supply condition. If the gap between the throttle valve and the valve seat of the carburetor becomes larger due to wear, all the air entering the cylinder block can not be used to atomize the fuel, so it must be repaired or replaced in time. When air and fuel are completely burned, only by providing more air can fuel be completely burned, thus achieving the purpose of saving fuel.

Three measures can be taken to adjust the fuel supply of carburetor: one is to appropriately reduce the oil level in the float chamber, the other is to reduce the linear size of the main metering hole, and the third is to reduce the cross-sectional area through which fuel passes. When reducing fuel supply, we should give consideration to the acceleration and maximum speed of motorcycles and keep them at a considerable level. Fuel consumption is the most reasonable at this time.

What kind of speed is more fuel efficient?

1, the fuel consumption curve of the engine is hook-shaped, which belongs to the low fuel consumption area in the middle speed range. Medium speed generally refers to 3000-4000 rpm. If it is lower than this speed, the flow rate of mixed gas decreases, which makes the mixing uneven, the combustion becomes bad and the fuel consumption increases. When the speed is higher than this range, in order to make full use of the maximum power of the engine, the carburetor of the engine will supply rich gas and the fuel consumption will increase. According to this principle, as long as the speed is often controlled within the range of medium speed, it will inevitably save fuel. The total transmission ratio between the engine and the wheels of a three-wheeled motorcycle is different from that of a two-wheeled motorcycle. The transmission ratio of three-wheeled motorcycle is 8-9, and that of two-wheeled motorcycle is 5-6. Three-wheeled motorcycles correspond to a speed of 3000-4000 cycles per minute, with a speed of 20-30 kilometers per hour in the third gear and more than 40 kilometers per hour in the fourth gear. The corresponding speed of two-wheeled motorcycle is 3000-4000 cycles per minute, the third speed is 30-40 kilometers per hour, and the fourth speed is more than 50 kilometers per hour; The above speeds are in the middle throttle position, so if you want to save fuel, you should avoid using the big throttle and use the middle throttle.

You can make full use of the inertia of motorcycle to save fuel when driving. One driving situation is that when you want to stop, you only use the inertia of the motorcycle, don't brake, and stop automatically after driving for a while. In another case, when there is an obstacle in front of the driver, he will slow down in advance and slide in neutral. When the car reaches the obstacle, the speed will be reduced, so it can cope with the emergency, which avoids consuming the energy of the engine through braking and deceleration, so it can save fuel.

3. In long-distance driving, if you want to save fuel, you must master the speed of the motorcycle you use at the lowest fuel consumption. Generally, the minimum fuel consumption of two-wheeled motorcycles is 70-80km/h, and that of three-wheeled motorcycles is 45-50km/h..

4. Reasonable tire pressure is an important factor of fuel saving. Motorcycle tire pressure must meet the requirements of the manual. If the air pressure is insufficient, the tire will be deformed, resulting in unnecessary energy consumption and increased fuel consumption. Therefore, it is best to check the tire pressure with a barometer before driving, especially before driving for a long distance.

It should be pointed out that some people think that taking a taxi can save fuel, which is wrong. Taxi driving seems to save fuel, but motorcycles must accelerate to a higher speed before they can slide. At this stage, fuel consumption will increase, and on average, it may not save fuel. Moreover, it is unsafe for taxis to drive in crowded places in urban areas, because the engine can't participate in production and can only be braked by brakes, so the braking effect is poor and it is extremely unsafe in an emergency.

Save fuel while driving.

There are many ways to save fuel for motorcycles, such as choosing fuel-efficient models, adopting fuel-efficient maintenance measures and driving methods, and updating old cars in time. Among them, how to save fuel in driving is the key.

After starting the motorcycle cold start, wait for the engine to run for about one minute, and then pull the choke handle back to the full open position. Some people like to close the choke at an angle, so that the combustible mixture entering the cylinder is too rich, which leads to an increase in fuel consumption and a decrease in engine power. Some people start before driving, which not only does not save fuel, but also accelerates the wear and tear of engine parts.

Start at a low level. Don't step on the accelerator until the clutch is engaged. When the clutch is in semi-linkage state, slowly release the clutch, and at the same time slowly open the throttle to meet the requirements of engine speed and start, so that the motorcycle can start smoothly, otherwise the engine will not work continuously, and the engine will stall as soon as the clutch is released. This will be repeated several times and will consume a lot of oil.

Gear shifting: grasp the timing of gear shifting and shift gears in time. After the motorcycle starts, if the road conditions are smooth and smooth, you must quickly change from low to high. Don't drive at low speed or for a long time. When you feel that the engine power is insufficient, the vehicle speed is gradually reduced (such as uphill), and the original gear is not suitable for continuous driving, you should quickly shift to a lower gear. Don't use high-grade hard support to make the engine too hard, and don't use clutch semi-linkage and throttle to improve the speed.

Keep driving at a medium speed (that is, close to the economic speed). The higher the vehicle speed, the greater the air resistance and the more fuel consumption. The lower the vehicle speed, the lower the corresponding gear, and the smaller the power utilization ratio of the engine, so the fuel consumption required for driving the same route increases. In addition, making full use of inertia during driving can also save fuel: one is to use the inertia when the motorcycle is about to stop without braking, and stop automatically after a period of oil reduction. The other is to slow down in advance, and when there is an obstacle in the distance ahead, slide in neutral. When the car reaches the obstacle, it can be dealt with urgently, so as to avoid the energy consumption of the engine caused by braking deceleration.

Don't step on the accelerator when accelerating. As long as you reach the speed you need, it is appropriate. Some people get into the habit of driving: getting on and off the bus, or even changing the horn into empty oil. This not only consumes a lot of gasoline, but also accelerates the wear of parts and increases the noise of the engine.

Reasonable tire pressure is an important factor in fuel-saving driving, and motorcycle tire pressure should comply with the provisions in the manual. If the air pressure is insufficient, the tire will produce unnecessary energy consumption due to deformation, thus increasing fuel consumption. Therefore, it is best to check whether the tire pressure is normal before driving, especially before long-distance driving.

How to save fuel while driving? Let's take a look at the following explanation: the fuel consumption curve of the engine is fishhook-shaped, and it is a low fuel consumption area in the middle speed range. Medium speed generally refers to 3000 ~ 4000 revolutions per minute. If it is lower than this speed, the flow rate of mixed gas decreases, resulting in uneven mixing, bad combustion and increased fuel consumption. When the speed is higher than this range, in order to give full play to the maximum power of the engine, the carburetor of the engine supplies rich gas, and the fuel consumption will also increase. According to this principle, as long as the speed is often controlled within the range of medium speed, it will inevitably save fuel.

The total transmission ratio between the engine and the wheels of a three-wheeled motorcycle is different from that of a two-wheeled motorcycle. The total transmission ratio of three-wheeled motorcycle is 8 ~ 9, that of two-wheeled motorcycle is 5 ~ 6, and the corresponding rotation speed of three-wheeled motorcycle is 3000 ~ 4000 rpm. The speed of the third gear is 20 ~ 30 km/h, and the speed of the fourth gear is more than 40 km/h. The speed of two-wheeled motorcycle is 3000 ~ 4000 rpm, the speed of third gear is 30 ~ 40 km/h, and the speed of fourth gear is more than 50 km/h. The above speeds are in the middle throttle position, so if you want to save fuel, you should avoid using the big throttle and use the middle throttle.

When driving, you can make full use of the inertia of the motorcycle to save fuel. When you want to stop, just use the inertia of the motorcycle, there is no brake, and it will stop automatically after driving for a while.

I suggest you go to the local regular driving school to register for the motorcycle driver's license.

The cost is generally around 550 yuan.

Just bring my ID card, six one-inch color photos with a white background, and the physical condition certificate (physical examination form) issued by medical institutions at or above the county level to register at the local regular driving school.

According to the regulations, you can only take a motorcycle driver's license at the place where your account is located.

& lt& lt； ：

Thirteenth people who apply for a motor vehicle driver's license for the first time can apply for a motor vehicle driver's license for city buses, large trucks, small cars, small automatic cars, low-speed trucks, three-wheeled cars, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, mopeds, wheeled self-propelled vehicles, trolleybuses and trams.

If you apply for a motor vehicle driver's license for the first time in your temporary residence, you can apply for a motor vehicle driver's license for small cars, small automatic cars, low-speed trucks and three-wheeled cars.

Article 18 To apply for a motor vehicle driver's license for the first time, an application form for a motor vehicle driver's license shall be filled in and the following certificates shall be submitted:

(1) the identity certificate of the applicant;

(2) physical condition certificate issued by medical institutions at or above the county level or at the regimental level.

Article 24 Examination subjects are divided into road traffic safety laws and regulations and related knowledge examination subjects (hereinafter referred to as "subject 1"), venue driving skills examination subjects (hereinafter referred to as "subject 2") and road driving skills examination subjects (hereinafter referred to as "subject 3"). The examination order is in accordance with subject 1, subject 2 and subject 3. Only by passing the exam of the previous subject can you take the exam of the latter subject.

For the first time to apply for a motor vehicle driver's license or increase the number of quasi-driving models, the vehicle management office shall issue a driving skill certificate within three days after passing the examination. The driving skill certificate is valid for two years. Applicants should complete the examinations of subject 2 and subject 3 within the validity period.

Twenty-sixth for the first time to apply for a motor vehicle driver's license or to apply for an increase in the number of quasi-driving models, the applicant shall meet the following requirements when making an appointment for examination subject 2:

(a) to apply for small cars, small automatic cars, low-speed trucks, three-wheeled cars, ordinary three-wheeled motorcycles, ordinary two-wheeled motorcycles, mopeds, wheeled bicycles, trolleybuses and trams, and make an appointment for the examination within ten days after obtaining the driving skills admission ticket;

(two) to apply for large buses, tractors, city buses, medium-sized buses and large trucks, and make an appointment for the test 20 days after obtaining the driving skills admission ticket.

Twenty-seventh for the first time to apply for a motor vehicle driver's license or to apply for the increase of quasi-driving models, the applicant shall meet the following requirements when making an appointment for examination subject three:

(1) Those who enter the examination for low-speed trucks, tricycles, ordinary tricycles, ordinary two-wheeled motorcycles, mopeds, wheeled motorcycles, trolleybuses and trams are allowed to drive, and make an appointment for the examination within 20 days after obtaining the driving skills admission ticket;

(two) to apply for small cars and small automatic cars, and make an appointment for the test within 30 days after obtaining the driving skills admission ticket;

(three) to apply for medium-sized passenger cars and large trucks, and to make an appointment for the examination within forty days after obtaining the driving skills admission ticket;

(four) to apply for large buses, tractors and city buses, and make an appointment for the test within 60 days after obtaining the driving skills admission ticket.

Twenty-eighth for the first time to apply for a motor vehicle driver's license or to apply for an increase in the number of quasi-driving models, the vehicle management office will issue a motor vehicle driver's license after the applicant has passed the examinations in subjects one, two and three.