1, carburetor
means the combustible mixture is formed in a spark ignition internal combustion engines (e.g., gasoline) manipulation of gasoline, kerosene and other fuel and air, known as evaporator. Carburetor function are: depression by the driver changes the position of the accelerator pedal, according to the different status of the internal combustion engine, to provide a corresponding number of fuel; fuel atomization and air and combustible gas mixture mixed to obtain a certain component, so that good combustion; ensure a smooth transition between the various engine operating state.
2, working principle and system
works The picture shows the schematic structure of the carburetor. When the engine work, the flow rate increases when the air flows through the intake pipe, so that a vacuum is generated there, the fuel in the float chamber through the main jet nozzle and the aspirated, injected into the throat. Fuel is atomized by the high velocity air stream and mixed therewith, the mixing process continues until the cylinder. Throttle valve with the gas mixture fed to the cylinder.
carburetor
Operating System Such a simple carburetor can not meet the requirements for composition of the mixture of the internal combustion engine under various conditions. Thus, in general internal combustion engines, especially automotive internal combustion engines used in other systems also need to have the carburetor comprising a main oil-based, idle system, enrichment system, accelerating system and the starting system.
major oil-based major oil type carburetor main supply system. From a common main oil line correction (compensation) method has three kinds: ① infiltrated air compensation; ② the amount of oil to alter the main pin hole area; ③ while varying the throat area and the main jet. Wherein in a first method for more general use. The method of compensating air is added between the main nozzle hole and the amount of primary air jet and the foam tube, whereby the infiltration of air, in order to reduce the degree of vacuum at the main jet, thereby controlling the fuel flow, to obtain the required composition of the mixture. The mixed gas composition for the stabilization, a float chamber with a through hole communicating with the atmosphere, with the float controlling the float needle into the oil chamber of the oil level height remains stable. Generally lower level than the nozzle 5 to 6 mm, in order to prevent the fuel from the internal combustion engine is inclined overflow. Shaped pipesShape and size determines the air flow rate and the degree of vacuum, and thus affecting the supply amount of fuel atomization inflated condition of the internal combustion engine, the main oil-based. In order to obtain good high-speed air current to cause atomization, while the inflator increases, to adopt a double pipe or triple pipe. Oil-based primary condition can meet most of the requirements of air-fuel mixture. In special conditions, also we need to have auxiliary systems.
System Idle operation of the engine itself, but no work outside called idling time, nearly closed throttle valve, the degree of vacuum at the throat of the fuel can not be drawn out and atomized. Thus it is provided with a throttle in the idle ejection outlet, by vacuum aspiration fuel here. It is provided with idle and the idle fuel orifice in the idle orifice passage air amount in order to control the fuel oil and foamed. Idle rotation speed can be used to adjust the idle screw. In order to ensure a smooth transition from the idle to the main oil-based system operates working oil path between the idling orifice and the idling is also a transition nozzle throat.
economizer enrichment system to meet the economic requirements, the main oil-based mixed gas is supplied leaner most conditions. But close the throttle valve fully opened, maximum power requirement, which requires the supply of rich mixture. Usually with a fuel-efficient for this purpose. An economizer and a mechanical vacuum two. The former leverage associated with the throttle valve, the latter valve to switch the economizer by vacuum after the throttle valve. When the valve is opened by a part of the power into the multi-hole oil enriched fuel mixture gas to obtain maximum power. When
system, acceleration of the engine acceleration, throttle opening suddenly large. Mass air fuel ratio large, the inertia is large, it is difficult to promptly increase the fuel supply amount, thus thinning the instantaneous gas mixture. This makes the engine speed increases slow, or even stop the intake pipe or tempering. Thus, there is a permanent acceleration pump, which is driven by a throttle lever and by a spring. Acceleration, acceleration pump fuel into the throat; slowly when the throttle opening, the acceleration fuel back to the pump through a float chamber inlet valve, fuel injection is stopped.
When the engine starting system starting speed is low, the temperature is low, atomization of fuel and gasification are poor. Thus requiring thicker supplied mixed gas, to ensure combustion engine start. Thus the need for a separate starting system. Starting system has many forms, the most common is installed before a choke throat, starting close to the throat formed at a high degree of vacuum, a large amount of fuel ejection force, the richer air-fuel mixture is formed.
3, type carburetor
Type
Many of the carburetor: the installation can be divided by suction, and the suction level of suction; chamber can be divided by the number of single chamber, and four dual chamber cavity. Multi-chamber carburetor is used only for gasoline automobiles, the operation sequence is divided by the throttle and acting splitter and two. And a movable throttle operated simultaneously each chamber, each chamber supplying the mixed gas to a few cylinders, respectively. Iso-half of the chamber is supplied with air-fuel mixture in most conditions, in order to obtain a good economy. When a large load, the other half of the chamber also participate in the work, a multi-part mixed gas supply, in order to get more power. Special-purpose internal combustion engine (e.g., chainsaws, aviation engine), can be used without carburetor float bowl.
4, with FIG.
Part Number: 13200-79250 Applicable models: SUZUKI F8A 
Part Number: 13200- 85231 vehicle Application: SUZUKI F10A
5, carburetor normal maintenance
carburetor engine under the action of vacuum generated by a certain ratio of gasoline and air mixing mechanism.
, then the gasoline into the carburetor from the fuel tank through the fuel filter, fuel filter can be mixed in gasoline and oxide impurities in the tank was filtered off. If the filter quality defects, there are still some impurities through the filter into the carburetor. Further gasoline contains gel-forming component, a long period of time deposited coagulate colloid adhered on the carburetor parts (e.g. orifice), the surface of the float chamber and the oil channel.
Air entering the carburetor through the air cleaner, the intake resistance can not be based on other factors too largeConsiderations, the filter device can not be too dense, and thus part of the air through an air filter still minor impurities into the carburetor. If the quality of the filter is defective, it can cause more serious effects. Composition carburetor oil passage airway more components, such as the main jet, the pilot jet, the amount of primary air holes, the amount of idle air holes, the inner diameter of the main foam tube and so has a small hole (inner diameter 0.3 between ~ 1.5mm), impurities into the gasoline carburetor, gum and impurities in the air, or change the apertures will tend to clog, resulting in airway carburetor, poor oil passage so that the carburetor for changes in oil characteristics, performance and even cause carburetor malfunction.
carburetor normal maintenance is actually maintaining the cleanliness of the carburetor when the factory, which specialized in the carburetor manufacturers, such as my company as a key indicator to assess the quality of the carburetor control , said control standards in order to achieve this the three companies, the use of advanced technology equipment and strict control in every aspect of production. Therefore, to ensure the normal use of the motorcycle, you must pay attention to the carburetor normal maintenance: regular cleaning carburetors, carburetor to keep oil passages, airways clean, small aperture open. It is also very important to extend the life of the carburetor. From experience, a lot of fault carburetor performance, can be solved by periodically cleaning the carburetor.
Maintenance Note:
1: Carburetor is the key parts of the engine, small changes may affect vehicle performance. Thus carburetor disassembly process, to use a suitable tool, and moderate intensity, to prevent deformation of parts. Yaoan removed parts neatly order to prevent wrong or missing equipment assembly installed.
2: carburetor to be cleaned in a clean field. First wipe clean the outer surface of the carburetor, the carburetor of the internal parts for cleaning agent may be used, or industrial gasoline. In addition to the impurities to be noted that parts of the surface of the gum benzine. Cleaning the parts with compressed air blowing, it can not be used to produce burrs wiping cloth or paper to prevent recontamination. Clogged orifice disabling bypassed steel and other hard objects, to prevent changing the aperture carburetor performance variations due to, gasoline or compressed air should be cleaned out.
3: carburetor assembly process, the screws coupled to the float chamber, the carburetor and the engine coupling screws, screwed avoid once, several times must be tightened, the tightening torque is generally 12N.m ~ 15N.mbetween. Otherwise it will cause deformation of the joint surface, air leak or oil leak. Parts orifice tightening torque is generally between ~ 1.5N.m 3.0N.m, tightening torque will damage the threads, resulting in deformation of parts, and even metal chips, resulting in secondary pollution, impact performance carburetor.
4: The process of cleaning the carburetor, the carburetor float chamber have found more sediment, often due to failure caused by fuel filter. This time to check for the fuel filter, such as the failure to confirm need cleaning or replacement of the fuel filter.
5: If not using the motorcycle, the need to carburetor float chamber fuel exhausted, gasoline gum to prevent condensation deposition, resulting in the carburetor malfunction. In addition, special emphasis is: idle adjustment screw position on motorcycle emissions, idling, transitions, fuel consumption and other properties have a significant impact due. Generally prohibited movable idle air adjustment screw (see figure) when the carburetor cleaning. If it proves necessary when detached idle air adjustment screw should first adjusting screw in the end, remember screwed into the turns (to the nearest 1/8 of a turn), return to the original number of ring assembly.
Causes:
The carburetor as a precision mechanical device, it has an important role in the engine can be called engine “heart.” From a professional point of view: the carburetor itself, the failure rate is extremely low. But why often carburetor failure rate is not low in actual use it? There are two reasons: ① Since all engine operating characteristics are associated with the carburetor, such as acceleration, transition, fuel consumption and so on. Therefore, when the motorcycle is determined for performance reasons failure occurs, the fault will tend to the carburetor or other mechanical components of the electrical device confused, false failure carburetor replace the carburetor. Such as: invalid filter impurities clog the carburetor, replaced with a new carburetor failure to eliminate, but does not solve the fundamental problem. ② related parts quality problems, greatly shorten the life of the carburetor. As cleanliness is reduced, increasing the wear carburetor parts, and so on. As a professional manufacturer of carburetors, we’re partnering with the motorcycle OEMs, but also often encounter similar problems.
Fault analysis and removal methods:
starting difficulties
Rough idle
Adverse
Transition
underpowered [123 ]
carburetor oil
High fuel consumption
starting difficulties
According to the national standard, basing on the proper use of the carburetor enrichment device, pedal or electric starter for more than 15 seconds, engine still can not maintain continuous operation ruled start-up difficulties. Difficult start of the respective negative and methods are the following.
1: no fuel carburetor float chamber
carburetors passage blockage. Analysis and negative steps as follows:
Open carburetor float chamber, the float drops check whether the needle driven into the oil will fall. If the needle does not vary with movement of the float needle valve seat and remains tightly bound, it can be determined with a valve needle intake passage caused by adhesive blocked, this failure is generally a gasoline gum coagulation caused between the needle and the valve seat. It can be washed with acetone or alcohol. Such failures often appear on the motorcycle is not used for a long time. In particular, do not put gasoline in the carburetor float chamber after the engine plant and a motorcycle factory installed in inventory or sales period slightly longer case, there will be gasoline gum condensation, resulting in performance carburetor malfunction.
Remove the needle valve and a float, the carburetors Nozzles access gasoline, gasoline flowing conditions was observed from the valve seat opening, if no gas flows out into the oil passage was blocked, compressed air may be used Nozzles blown into the oil treatment.
Further, oil plug show amounts of impurities into the interior of the carburetor. The fundamental reason is caused by the failure of the fuel filter. Thus while cleaning the carburetor, fuel filter need to be checked.
2: start enrichment device failure
carburetor designed to improve the starting performance, specifically set start enrichment means motorcycle start enrichment means there are two main forms of the structure:
choke mechanism: the choke mechanism is relatively simple mechanical means generally used for a straddle type vehicle (e.g., CG125 motorcycle), a handle can be used to observe the choke pulled choke whether the method sheet for movement therewith to determine whether it is normal, this means fewer failures.
bypass enrichment system: bypass enriched more systematic classification, the most widely used is electric and manual bypass enrichment system. Bypass electric scooter for general enrichment system. Troubleshooting of which the following steps: A: Motorcycle opening switchesAfter 4 to 5 minutes, hand touch electric start enrichment plastic valve housing, if the thermal circuit is normal; check circuit otherwise required, such as enrichment valve interface circuit is normal is determined enrichment damaged valve in need of replacement. B: Remove the starter during the starting valve and 0 to 5 minutes, observed enrichment valve plunger exercise condition, if the enrichment of the valve plunger extends continuously with the spring connected to the circuit, the valve is normally enrichment; otherwise enrichment valve PTC heating substrate damage, the need to replace the valve assembly enrichment. C: Cleaning enrichment channel on the carburetor body with compressed air. Manual bypass enrichment system applications 50 other models magnolia. Troubleshooting of which the following steps: a: a spin valve connector on the starter, pulling grip switch enrichment observed enrichment wire can move up and down the plunger drive enrichment. If the plunger does not move or drop the enrichment enrichment disconnected cable, the cable to be replaced enrichment. b: Remove the carburetor float chamber, a float chamber was observed whether the foam sealing pad starter hole is smaller than the inner diameter due to expansion and contraction of the outer diameter of the starting foam tube. If the seal is too small or the need to replace the gasket inner diameter increasing starting foam tube, typically greater than the outer diameter of the starting foam tube can be 1 ~ 2mm. C: Cleaning enrichment channel on the carburetor body with compressed air.
3: low idle
low idle phenomenon: the engine steady operation can be started but can not turn off after a few moments.
Remedy: adjusting the carburetor plunger adjustment screw, screwed into the clockwise direction, the engine speed increases; a counterclockwise rotation, engine speed is reduced. Usually the engine speed was adjusted to 1500 rev / min (straddle type vehicle) and 1700 rev / min (scooter) to about. 4: Incorrect starting methods
substantially incorrect starting method in the utility start enrichment means that the common start incorrect way:
does not use the start enrichment device . This is because the user to understand the function of the motorcycle due to incomplete, because even at room temperature using the start enrichment device, will greatly improve the starting performance.
starting process start enrichment means has been used (in terms of the choke mechanism and a manual bypass means enrichment). Provided to the engine starting operation of the system is enriched gas mixture is very strong, if the starting process has been used enrichment device, a large amount of rich mixture into the cylinder will “drown” the engine, so that the starter becomes difficult.
plusThe proper use of the device is concentrated: 3 to 4 times after starting when the engine does not operate, closing the enrichment device, and a micro rotary carburetor throttle handle to enable the plunger to rise after restarting.
Rough idle
idle instability phenomenon: a few minutes after the engine warm-up operation, the engine idle speed fluctuation is greater than ± 100 rev / min is the idle instability.
Cause idle instability occur: the blockage or leakage condition, occur idle oil-based oil is too thin or partial concentration phenomenon, resulting in engine idle speed instability occur in the carburetor idle system oil passages or airways.
1: the pilot jet partially blocked
Reason: pilot jet partial blockage, the partial lean fueling idle state, idle instability phenomenon leads.
Remedy: carburetor can be cleaned by the cleaning method.
2: idle adjustment screw (commonly known as “wind needle”) position variation
the idle adjustment screw role is to change the idle oil passage or gas by adjusting the idle speed adjusting screw the flow passage cross section of the carburetor idling fuel supply to achieve the desired state. Idle speed adjusting screw by function into transfer oil (e.g., CG125 carburetor) and transfer gas (e.g. Magnolia carburetor 50) two.
For carburetor professional manufacturer: effects due to the idle adjustment screw on the performance of the engine is large, the idle speed control before the factory screw carburetor rigorously tested and adjusted to an optimum position. Which generally prohibit the idle adjustment screw adjusted by the user. After a long period of use, in order to adjust the idle speed adjustment screw if the location does change and cause adverse consequences. Find the best position of the idle adjustment screw in two ways:
A: Best adjustment method
First, the plunger is fixed to the product of weakness often higher idling engine speed, rotate around idle speed adjusting screw, to find the maximum speed at which the position of the plunger, the plunger slightly to adjust the adjusting screw, the engine speed is reduced to find the maximum speed, thus repeated until the maximum speed at a certain position of the plunger is equal to the standard vehicle idle speed until. For four-stroke engines, sometimes done after concentration of CO optimum adjustment is still high, then adjustments can be suitably employed Paris France.
B: Paris adjustment method
Paris adjustment method is carried out on the basis of the best do the adjustment method, which intentionally idle speed adjusting screw to the mixing point becomes lean direction of rotation (only allowed to rotate up to 1/8 of a turn), then the rotational speed to reduce and then raise the plunger to restore it to the original speed. The values are adjusted to make slight HC, CO value decreases. HC can not rise too much in principle, it can be lower than the standard of CO. If the result of the adjustment of CO Paris law compliance, exceeding the HC is not allowed. If compliance can not at the same time CO and HC, is not changed when the conditions described, the carburetor can not meet the emission requirements. Here you can also be seen by the CO and HC limits of adjustment ensure reasonable. Otherwise, the blind will lower CO, HC result of the excessive, unreasonable burning in the state.
However, if emission standards, not the best method to adjust Paris, if compliance HC, CO and exceeded, adjustments can be suitably used Paris France, Paris adjustment method if the CO and HC can not simultaneously compliance with the best adjustment method You may need to carburetor and ignition system checked.
3: carburettor and the engine intake pipe connection pad or gasket damage
connected to a gasket or gasket damage leakage phenomenon occur, additional air enters engine fueling partial thin idle state, idle instability phenomenon leads.
Remedy: replace the gasket or O-ring can be connected.
4: carburetor and the engine intake pipe connecting bolts loose
Loose bolts also leakage phenomenon occur. Remedy: tighten.
One thing should be noted that: the current carburetor used on most scooters are enriched with heated bypass system. Under the action of the system, after the start motorcycle high idle speed (up to 2200-2300 revolutions / minute), after 4 to 5 minutes warm glow bypass enrichment system shutdown, it was returned to the engine idle speed 1500 rev / min. This is normal and does not belong to the “idle instability” fault. Wang Users careful not to misjudge.
Transition failure
motorcycle from start to accelerate the process of moving, the carburetor idle oil-based oil is gradually reduced transition to the main oil-based oil is increasing. For smooth engagement between the idle fuel supply system and the main oil-based oil, oil provided transitionDepartment to ensure that the process of starting a motorcycle ride. Adverse transition phenomenon: when the initial acceleration process, with the throttle opening and engine speed fluctuations or large flame.
poor transition reasons and troubleshooting methods are as follows:
1: the pilot jet, idle passage, the main jet, a transition aperture partially blocked
[123 ] reason: the pilot jet, idle passage, the main jet, a transition aperture partially blocked so that the carburetor relevant partial thin oil-based oil, cause poor transition.
:: Remedy according to the cleaning method of cleaning carburetor. After the foam tube carburetor effect is to promote the mixing of gasoline and air, foam cells in the foam tube are clogged with impurities:
2: blockage foam tube
Cause , petrol and air mixing effect is reduced, decreased quality of atomization, causing adverse transition.
Remedy: carburetor can be cleaned by the cleaning method.
3: idle speed adjustment failure
Cause: the process of transition from the idle carburetor main oil supply system, if the idle adjust properly, the transition will affect the performance.
Remedy: idle speed control adjustment method according to the adjustment screw.
underpowered
is mainly underpowered motorcycle performance acceleration and high speed performance.
Evaluation of accelerating the motorcycle has two indicators: beyond the initial acceleration and acceleration. Its performance varies with different models and displacement detection method (such as the shift timing control and throttle opening velocity) for the user to grasp easily. Because different users throttle control speed difference is large, the feeling of acceleration is also different. So when the user feels poor acceleration, it is best to professional service points diagnosis. Users can determine the initial phenomenon following his motorcycle is low on power phenomenon. Accelerate the process clearly felt sluggish than in the past, power down.
decreased maximum speed, the vehicle a “red hair”, the exhaust pipe blasting phenomenon at high speed.
causes of insufficient power and negative as follows:
1: main amount or pilot jet clogging
Cause: the amount of the pilot jet, or main cause clogging carburetor fuel supply is too thin, resulting in insufficient power.
Remedy: carburetor can be cleaned by the cleaning method.
2: idle oil passage, airways or main gallery, airway obstruction
Reason: idle oil passage, airways or main gallery, airway blockage It will cause the carburetor fuel supply is too thin or partial concentration, leading to lack of motivation.
Remedy: Same as above.
3: work start enrichment means abnormality
Cause: This failure occurs mainly on the bypass enrichment device. Electric bypass device failure or starting enrichment process hairpin plunger extends, manual bypass defective start enrichment means the return of the plunger, the plunger will cause the starter does not fall in the end the mixture is too thick malfunctioning of the engine.
Remedy: – means for using a hot start enrichment means carburetor terms: the need to replace electric start enrichment valve. – for vehicles equipped with a manual device enrichment: enrichment generally due to their prolonged use wire housing caused by excessive friction, the surface of lubricating oil in the butter or other enrichment wire can be solved.
4: poor acceleration pump oil or blockage means
(p carburetor with the acceleration pump apparatus, the motorcycle carburetor as CB125) [ 123] instantaneous acceleration of the motorcycle, since the plunger lifting speed, fueling lag appears, partial thinning behavior. Acceleration pump means provided for this purpose in some models with carburetor: instantaneously accelerated, the additional portion of the oil supply to meet the needs of the engine, to improve the acceleration responsiveness. Reason: acceleration pump oil passage accelerator pump diaphragm failure or blockage.
Remedy: acceleration pump oil passage clogged with compressed air cleaning acceleration pump oil passage; accelerator pump diaphragm failure need to replace the accelerator pump diaphragm.
carburetor oil
carburetors system is a dynamic balance system. Float float chamber under the effect of buoyancy gasoline, driven continuously adjust the gap between the needle and the needle control valve into the oil, so that the motorcycle to maintain dynamic stability under various conditions float chamber oil. Carburetor leakage phenomenon occurs, that is, the balancing system has been damaged due. CarburettorOil spill not only increase fuel consumption, affect vehicle performance, more importantly, cause greater harm to the safety of the vehicle. The need for timely to be eliminated. Cause carburetor leakage and exclusion method:
1: needle and valve seat of the foreign matter attached to the surface
Reason: the needle and into the control valve oil, which stringent sealing requirements, the contact surface roughness higher. The foreign matter adhering to the contact surface, the needle valve will cause the valve seat sealing leakage, leakage phenomenon occurs. Foreign body mainly refers to the gasoline impurities and condensation gum. Therefore to avoid such a failure occurs, the user should pay attention to regularly clean up the fuel filter and use good quality gasoline.
Remedy: carburetor can be cleaned by the cleaning method.
2: Wear needle
reasons: ① needle during use since long been in contact with the valve seat erosion and impurities contained in the gasoline wear ② float float adjustment at both ends of the imbalance, lateral force to drive the needle valve wear. Needle and cause wear seat Mifengbuyan oil spill.
exclude methods: ① replace the needle, while the user is to be noted that fuel filter and clean periodically using a good quality gasoline. ② Replace needle, while adjusting the pontoon float ends at the same level.
3: float issuing
reasons: ① float chamber wall by deformation of the contact with the float expansion gasoline long-term immersion. ② float float pin holes of the body over a long friction pin for expanding the clearance, resulting in contact with the float of the float chamber wall. Issuing the float needle valve can not return, resulting in oil spills.
exclude methods: ① The modification replace float float. ② The wear of the outer diameter of the float pin becomes small, the replacement of the float pin, such as pin holes float body wear becomes large, the total would be only replace the carburetor.
4: the float is immersed in petrol or broken
Cause: the float is immersed in petrol are damage or cause changes in weight and buoyancy of the float results in an increase of the oil, causing leakage oil.
Remedy: Replace the float.
high level of fuel consumption
fuel consumption is an important indicator of performance motorcycle users are most concerned about, is an important performance motorcycle. As a motorcycle carburetorThe key piece of the oil supply system, whether carburetor in good condition is essential impact on vehicle fuel consumption. Reduce fuel consumption carburetor manufacturers also continue to pursue the goal.
How to judge a motorcycle high fuel consumption it? General rule is the actual travel fuel consumption: two-stroke, four-stroke large displacement high ratio higher than the small displacement, than the manual clutch automatic clutch is high. Also different structures of the engine, fuel consumption is low is different. Specific values should be based on specific models. To currently more common models for: two-stroke fuel consumption of around 50 vehicles 3L / 100km, four-cycle fuel consumption of 70 to 100 cars in 2L / 100km or less, four-stroke 125 car fuel consumption is about 2L / 100km, four-stroke 70 to 125 scooters fuel consumption of about 3.0L / 100km. Users could then determine their own car is generally high fuel consumption.
The reason for the high fuel consumption and the elimination method:
1: carburetor oil
Causes and elimination of leakage supra.
2: air amount of each oil-based partially blocked hole
Cause: air amount of each oil-based partially blocked holes can cause partial concentration leads to the carburetor fuel supply liters high.
Remedy: carburetor can be cleaned by the cleaning method.
3: closed tightly start enrichment means
start enrichment means closed tightly and troubleshooting reasons supra.
4: outer diameter of the main jet needle by reducing wear, wear by the main nozzle hole is too large
Reason: in the course of the above-described components has long been the impurities contained in a high speed gas erosion and wear, reduced outer diameter of the main jet needle, a main nozzle hole is too large, resulting in increased amount of oil, increased fuel consumption.
Remedy: replacement orifice.
above are talking about is more common motorcycle several symptoms, only selected aspects of the carburetor failure analysis. But in fact many factors from the perspective of the machine, causing the above symptoms. The starting difficulties: the ignition system disorders, the spark plug electrode gap variations and the like will cause starting difficulties. The idle instability: motorcycle whole plant to reduce the noise of the engine cylinder head,The engine valve clearance adjustment is often too small, resulting in deterioration of the state of the engine intake and exhaust, idle instability occurs or no idle phenomenon. To analyze specific user according to the vehicle fault condition.
Due to space limitations, this article only some typical carburetor faults are analyzed. There are many types of failures not covered, please understand. But I believe that the efforts of the majority of the carburetor industry researchers, China carburetor design and quality levels will be beneficial to improve said. Many types of failures will be gone or greatly reduced, providing higher quality products for motorcycle users!