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What is the problem when a motorcycle emits blue smoke?

1 Answers

StKevin

07/29/25 10:01pm

Motorcycle emitting blue smoke indicates that the engine is burning oil, which may be caused by severe wear of the valves and valve guides or aging of the valve seals leading to poor sealing. It could also be due to severe wear of the pistons and piston rings, or insufficient tension of the piston rings causing oil burning. It is best to promptly visit a repair shop for inspection. Below are common motorcycle faults: 1. Clogged air filter: The rubber tube is bent and blocked, the foam plastic inside the air filter is clogged with dust, resulting in severe rich fuel mixture due to intake blockage. Remove and move aside half of the air intake pipe in front of the carburetor, straighten the intake pipe, and clean the foam plastic in the air filter. If the air filter is normal, adjust the carburetor. 2. Cylinder scoring in motorcycles: Mix a small amount of epoxy resin adhesive and gently apply it along the cylinder scratches to fill them. After about 20 minutes, sprinkle a thin layer of talcum powder, press it gently, then scrape it into an arc matching the cylinder with a piece of cardboard, and let it sit for 4-6 hours.

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