9月29日の日記

Such as low cleanliness, which will increase wearout of carburetor parts.Enriching unit will provide strong mixture to the engine, if it is working all the time during starting, there will be too much strong mixture inside the cylinder, which will make start difficult. When judging the malfunction of motorcycle, it is easy to mix the failure of other parts to carburetor and mistaken for carburetor fault and replace the carburetor. Then you should follow the below step.

Especially when the manufacturer of engine or motorcycle didn’t empty the oil inside float bowl of carburetor and there is also a long inventory or sales period, then there maybe this kind of situation and cause the failure of carburetor..It is usually happened with the user don’t know much about this function of motorcycle.1 Do not use the start enriching unit.Start enriching unit failureThere is a start enriching unit for the carburetor so as to improve its starting performance, there are two main types of lawn starter enriching unit.

Choke valve: this is a simply mechanical device which is usually used on straddle type vehicle, like motorcycle CG125.Here are analysis and solution on typical carburetor malfunction. But in actual use, its failure rate isn’t low. If the needle valve is still closely combined with the needle valve seat, that is to say, the congestion is caused by the combination bewteen needle valve and valve seat.There are two reasons:All the performance of engine is related to carburetor, such as acceleration, transition, fuel consumption and so on.Starting failure:According to the standard, if using 50cc carburetor starting enriching unit correctly and start time over 15 seconds after pedal or electric start, the engine can’t keep continuous operation, then this is starting failure.

Quality problem of related parts shorten the service life of carburetor.4.2 Remove the float and valve, get fuel from the carburetor inlet and check, if there is no fuel, that is inlet congestion.Carburetor is a precision mechanical device of motorcycle. Electric bypass enriching system is commonly used for scooter.The failure analysis and elimination steps are as follows:2. From a professional point of view, its failure rate should be very low.SolutionAdjust plunger screw on carburetor, screw clockwise and then the engine speed will increase while screw counterclockwise, engine speed will reduce.The cause and solution are as follows:There is no oil inside the float bowl of carburetorThere is congestion of carburetor inlet channel.1 Open the carburetor float bowl and check whether the oil needle valve drops when float drops.2. Otherwise, the PTC heating blade is damaged and you need to change the valve assembly.
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