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What are the common faults of motorcycles
What are the common faults of motorcycles

The editor today talks about the common faults of motorcycles

Common failure analysis

1. Blue smoke from the exhaust pipe

The failure phenomenon of blue smoke is: during the working process of the engine, light blue smoke is often seen at the tail of the exhaust muffler, and the organic oil is consumed too quickly. The cause of the failure may be: the oil level is too high; the compression pressure of the cylinder is lower than the specified value; the gap between the piston, the piston, and the cylinder barrel increases.

2. Black smoke from the exhaust pipe

The fault phenomenon of black smoke is: when the engine is working, the exhaust pipe emits black smoke, and the pungent gasoline smell can be smelled, which is more obvious when accelerating. The cause of the failure may be: the mixture is too thick; the spark plug is not working well; the ignition is too late.

3. White smoke from the exhaust pipe

The original failure phenomenon of white smoke is white smoke from the exhaust pipe when the engine is working. The cause of the failure may be: the fuel contains water; the cylinder or muffler contains water.

Troubleshooting

1. Blue smoke from the exhaust pipe

First, check whether the oil level of the engine oil is too high because the oil level is too high to cause the engine oil to run-up. When checking the oil level, do not check right after the engine is stopped, and check again after stopping for 10 minutes. If the oil level is too high, drain the excess oil in time. If the oil level is normal, check the compression pressure of the cylinder and the wear of the piston, piston ring, and cylinder to increase the possibility of the clearance of the engine that has been used for a long time. After inspection, the cylinder pressure is lower than the specified value, and the piston should be further checked for carbon deposits, excessive wear, or loss of elasticity. If the above situation occurs, the piston ring should be cleaned or replaced. When the cylinder barrel is severely worn and the gap between the piston and the cylinder barrel exceeds the specified value, boring the cylinder, replacing the piston, etc. should be done.

For engines that have just been overhauled or replaced with piston rings, the internal and external cuts (or chamfers) of the piston rings are often installed incorrectly, causing oil to flow up. If the above situation occurs, the piston ring should be reinstalled.

2. Black smoke from the exhaust pipe

Check the concentration of the mixture. After the malfunction occurs, first check the carburetor damper. When the engine is working normally, is there any phenomenon that the X longitudinal mechanism is stuck or malfunctions and cannot be closed or opened? If so, repair or replace it. Secondly, check: whether the oil level in the float chamber is too high; whether the float is leaking and cannot float; whether the main measuring hole needle valve is too open; whether the air filter is blocked, etc. After the engine is turned off, look at the main nozzle from the carburetor. If there is oil flowing out or dripping, it means that the oil level in the float chamber is too high. The tongue of the float should be bent upwards or an appropriate pad should be added under the needle valve. Film to adjust. Check the float. If there are a crack and oil leakage, it should be repaired or replaced by welding. Note that the weight of the float after welding will increase, and it must be re-adjusted during installation to ensure the normal liquid level. Check whether the triangular needle valve is not tightly sealed, etc., and replace it if necessary. Check the oil filter, if it is blocked, it should be cleaned or replaced.

Check the spark plug flashover. If the spark plug is weak or abnormal, the mixed gas will not burn, and black smoke will appear. Pull out the spark plug and make the sparking normal, and the spark is strong, indicating that the spark plug is not faulty; if the spark of the spark plug is not jumping along the electrode, but sparking around, it means that the sparking of the spark plug is abnormal, and a new spark plug should be replaced; if the spark plug has carbon deposits If it is serious, just clean it.

The engine exhaust is in the process of emitting black smoke. If there is a "sud" and "fire" sound, it means that the ignition is too late. If the above situation occurs, correct it in time.

3. White smoke from the exhaust pipe

The engine exhaust pipe emits white smoke, which is mostly caused by the moisture in the fuel, the cylinder, and the muffler. If white smoke persists, it indicates that the fuel is unqualified, and good quality fuel should be replaced. If it only emits white smoke at startup and disappears after the normal operation, this problem is not a concern.

4. Lack of power In such cases, the piston ring is mostly aging and the seal is not good, the valve is not tightly closed or the carburetor is blocked! The piston ring should be replaced. Valves and cleaning carburetor.

That's it for the common faults of motorcycles. Our Racepro sales team is the most professional team in the United States, with a solid motorcycle and custom cultural knowledge, which can help our customers better understand our parts and business model. In addition to some stable quality items, we also carry out 100% quality control to ensure that all goods arrive at customers in good condition. We will save you time in communicating with suppliers and make all customers focus on sales. We will be your strong supply chain. We will support the products we provide to you. If you have any questions or questions, we will help you solve them.

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  • jack 10:12 AM, Today
    Hello, dear sir/madam, welcome to our website! I’m Sally,how should I address you?