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Motorcycle failure analysis

Apr 11, 2020

1. Blue smoke from exhaust pipe

The fault phenomenon of blue smoke is: light blue smoke is often seen in the tail of the exhaust muffler during the operation of the engine, and the phenomenon of excessive consumption of organic oil. The cause of the fault may be: the oil level of the engine oil 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 can smell the pungent gasoline smell, which is more obvious when accelerating. The cause of the failure may be: the mixture is too rich; the spark plug is not working well; the ignition is too late.

3. The exhaust pipe emits white smoke

The original fault phenomenon of white smoke is: when the engine is working, the exhaust pipe emits white smoke. The cause of the failure may be: moisture in the fuel; moisture in the cylinder or muffler.

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