There are several signs that can indicate if a 4-stroke motorcycle engine is burning engine oil. Here are a few common indicators:
Exhaust smoke: If you notice excessive blue or gray smoke coming out of the exhaust, especially during acceleration, it could be a sign of burning engine oil. The blue or gray color is caused by the oil being burned along with the fuel in the combustion chamber.
Increased oil consumption: If you find that your motorcycle's engine oil level is consistently decreasing between oil changes, it may be an indication that the engine is burning oil. Keep track of how often you need to top up the oil to monitor the consumption.
Fouled spark plugs: Burning engine oil can lead to fouled spark plugs. If your spark plugs appear oily, blackened, or fouled with carbon deposits, it could be a sign of oil burning in the combustion chamber.
Strong smell of burning oil: If you notice a strong smell of burning oil while riding or after stopping your motorcycle, it could be an indication that oil is being burned within the engine.
Decreased engine performance: Burning engine oil can cause a decrease in engine performance, such as reduced power, sluggishness, or difficulty starting. If you experience any of these symptoms along with other signs mentioned above, it may be related to oil burning.
If you suspect that your motorcycle's engine is burning oil, it is recommended to have it inspected by a qualified mechanic. They can perform a thorough examination to determine the cause of the issue and recommend the necessary repairs or maintenance.