Diagnosing and Fixing the Oil in Air Filter and White Smoke in a Bajaj Pulsar NS200

Motorcycle enthusiasts often encounter a range of issues with their vehicles. One common problem that many owners of the Bajaj Pulsar NS200 face is finding oil in the air filter box and white smoke coming from the exhaust during high engine revs. This article aims to provide a comprehensive guide on diagnosing and fixing these issues step-by-step.

Understanding the Issue

The presence of oil in the air filter box and white smoke during high engine revs in a Bajaj Pulsar NS200 can be alarming. To accurately diagnose and fix the problem, it's crucial to understand the root causes and potential solutions. Here are some key points to consider:

Oil in Air Filter: Oil in the air filter is typically caused by an elevated engine oil level. If the oil level is higher than the manufacturer recommends, excess oil can be drawn into the air intake system, leading to the air filter becoming contaminated. White Smoke: White smoke from the exhaust is often an indication of coolant or oil in the combustion chamber. This smoke is usually associated with a damaged piston oil ring or a cracked cylinder wall, which allows oil to enter the combustion chamber and burn.

Steps to Diagnose and Fix the Issue

Checking and Adjusting Oil Level

Before starting any repairs, the first step is to check the engine oil level. If the oil level is higher than recommended, it's important to reduce it to the correct level. This can often solve the problem of oil in the air filter and reduce or eliminate the white smoke.

Turn off the motorcycle and let it cool down. Pump the rear brake a few times or engage the starter to push oil to the sump. Open the oil fill cap and check the oil level using the dipstick. Remove excess oil to the right level.

After making this adjustment, restart the motorcycle and check if the issue persists. If the smoke and oil in the air filter disappear, it indicates that the problem was related to the oil level. However, if the issues still persist, further investigation is required.

Inspecting Exhaust Valve

If the smoke and oil in the air filter persist after adjusting the oil level, the next step is to inspect the exhaust valve. While many experts might suggest replacing the piston, it's crucial to rule out other potential issues first.

Inspect the exhaust valve for any damage or irregularities. Listen for any unusual sounds when the engine is running. If you hear a knocking sound, it could indicate internal engine damage that requires further inspection. If the exhaust valve appears fine, you may need to perform a compression test to check for any weak cylinders.

Replacing Damaged Piston Oil Ring or Cylinder Wall

If the issues still persist and the exhaust valve and oil level are in order, it's highly likely that the piston oil ring or cylinder wall is damaged. These components allow oil to enter the combustion chamber, leading to white smoke and oil in the air filter.

Proceed with caution when replacing the piston oil ring or cylinder wall. It's a complex procedure that requires precise measurements and the right tools. Remove the old piston oil ring and inspect it for wear and tear. If it shows signs of damage, replace it with a new one. If the cylinder wall is cracked, it will need to be replaced or reconditioned using specialized tools.

Conclusion

Dealing with oil in the air filter and white smoke in a Bajaj Pulsar NS200 can be challenging, but with the right approach and attention to detail, you can successfully diagnose and fix the problem. It's essential to follow the steps outlined above, starting with checking and adjusting the oil level. Remember, don't rush to replace the entire piston unless all other potential issues have been ruled out.

After performing these checks and taking the necessary actions, it's crucial to provide feedback on the results. This information is vital for other motorcycle owners facing similar issues and can help improve overall motorcycle maintenance knowledge.

If you have any questions or need further assistance, feel free to leave a comment below. Happy troubleshooting!