9 Causes of White Smoke Motorbikes

9 Causes of White Smoke Motorbikes. The cause of the white smoky motor - Your motor emits white smoke, it can indicate a problem in the engine sector. To be sure, this white smoke is caused by oil being burned in the combustion chamber.

Causes of White Smoke Motorbikes

Is this condition normal?

Of course not, because burning on a 4-stroke motorbike only requires air, gasoline and sparks. If there is oil, it enters the combustion chamber, the combustion gas will contain a lot of emissions.

What is the effect?
As a result of motorbike 4 not bouncing white among others

• Engine oil will always be reduced, so we must always check and fill the engine oil
• This can indicate the wear of the linner or piston ring, resulting in reduced engine power.
• Burning oil can also cause excessive crust in the combustion chamber, as a result the engine combustion process will be disrupted.

The next question is, why can't the engine oil burn? In construction, the combustion chamber on the 4 stroke motorbike is closed. Of course this can be caused by many factors. The point is engine oil is a liquid with nano molecules that can enter into the slightest gap in the engine. So that if only a little component gap oil can enter the gap.

Cause the engine oil 4 didn't get burned

1. The piston ring is worn (worn)

The most common cause of white smoke is because the ring is hit. The piston ring is divided into two types, namely the compression ring and oil ring. The compression ring serves to close the gap between the piston and cylinder block so that the compression pressure does not leak while the oil ring functions to prevent oil from the crank chamber from entering the combustion chamber.

The shape of the ring is not perfectly round, but there is a gap. This gap allows the ring to enter the combustion chamber. But if the two rings wear and tear, the ring gap will expand. As a result, oil from the oil tank can easily enter the combustion chamber.

Usually there are other symptoms that follow it such as reduced engine power or a difficult engine to turn on in the morning.

The solution, you have to replace a set of piston rings to deal with this smoke. How to replace it is also not easy, because the piston ring is located in the heart of the engine. To make a replacement, the engine must be disassembled or overhouled.

2. Linner / cylinder engine hit (worn)

The second problem is also still related to the first cause. But the problem this time is not the piston ring, but the cylinder wall or linner.

You need to know, when the engine works the linner and the piston ring will always rub. So that within a certain period these two components will experience wear and tear. If this wear occurs, engine oil can easily enter the combustion chamber (same as above)

Symptoms such as loss power and a difficult machine to live when cold will also be encountered when the cylinder starts to wear out. How to overcome the wear of the cylinder walls, you need to bore up. Or re-turn the cylinder linner. For this matter, you need to go down the engine on the motorbike.

3. Valve seals leak

Apart from inside the engine, the factors that can cause oil to enter the combustion chamber are from the upper engine components. The valve or valve functions as a door that is tasked with entering air for engine combustion and regulating the exhaust gas from the combustion engine (intake and exhaust).

Each valve has a seal that prevents oil from leaking into the manifold. But due to usage factors, this seal can experience hardening which decreases the power of the meeting. So that oil can enter easily into the manifold and enter the engine.

The fix, is to replace the valve seal with a new one.

4. The valve stem is bent

The valve stem is an iron rod that connects the valve to the cam section. That is, in this rod lies the support of the cam when pressing the valve. In the normal position, the valve stem must be 100% straight without the slightest bend.

What happens if it is bent?

Automatic, the position cannot be centered. While the valve hole (which has a seal) has been set in a center with the intake / exhaust hole. This means that if the rod is bent, one side of the seal will be compressed and the other side will loose.

This allowance can become an oil pass entering the manofold connected to the combustion chamber. If you only replace the valve seal without replacing the valve, then a similar problem will come back on a daily basis.

So the solution is to replace two components, namely the valve seal and the valve itself.

5. The valve is blocked / Installation is incorrect

If this case is exactly the same as the one above, the difference is that this is due to an error in installing the valve. In the DOHC system, even though the intake valve is the same, the position of the two intake valves cannot be swapped.

When exchanged, there is potential for leakage because the valve seat and valve leaf are not suitable. To overcome this, we actually only need to wipe the valve so that the valve seat can match.

6. Packing the cylinder head is broken

The cylinder head packing is located in the middle of the cylinder block connection and cylinder head. its function as sealing, both the combustion chamber seal so that the compression pressure is not lost, also to close the oil line from the oil bath to the cylinder head.

From here, imagine what happens if it turns out the packing surface is damaged. Compression pressure can leak, and oil can also flow off the track. If the oil flows out of the engine then the smoke is normal, but there is a lot of oil seepage on the engine surface.

But if the oil leads to the combustion chamber, the exhaust fumes can be a bit blue white (depending on the quantity of oil entering).

If this happens, then there are other symptoms such as you will see the engine parts of the motor that are always dirty and there is oil seepage. Besides that, there is usually a rather rough voice.

The solution, is to replace the cylinder head packing with a new one.

7. The oil used is too runny

It sounds a bit strange, but oil that is too runny just makes the oil can enter small cracks in the engine. Normally, the machine will provide data on technical specifications including SAE oil used.

This is important because SAE also affects the oil's ability to lubricate small gaps. If the machines now are made from aluminum, the gap is very small so using SAE 0W oil is also not a problem.

But for old motorcycles, especially motorcycles designed for tropical countries are usually suitable to use oil with SAE 20W and above. If you use single grade SAE 0W oil, the oil can actually enter the combustion chamber through the piston ring gap even though the ring or cylinder is not worn out.

But for SAE 0W-20 multi grade oil it can still be used because there is a viscosity index improver that can regulate oil viscosity based on temperature / climate.

This problem occurs when your motorbike suddenly comes out of white smoke after an oil change. The solution, replace your motorbike oil with the appropriate spec (SAE that fits with SAE recommendations).

8. Effect of exhaust

The cause of another smoky white motor can also come from the exhaust itself. Some types of exhaust does have a system that can spray oil into the exhaust khsusunya racing exhaust so that the exhaust can survive at high temperatures. The result is the oil sprayed in the combustion gas will burn because the exhaust gas temperature is quite high. So that the exhaust will emit white smoke.

This condition is not dangerous for the engine with the record that the engine oil volume is still sufficient. But to ensure this, you need to remove the exhaust of your motorcycle and try turning on the engine. If there is no white smoke coming out of the engine, there is nothing to worry about.

9. Your motorbike turns out to be 2 stroke

All the problems above may not be met, but the motorbike still emits white smoke, after checking it turns out that your motorbike is entering a two-stroke motorbike.

Why don't the two motors emit white smoke?

This is actually the lubricating mechanism of a two-stroke engine. The two-stroke motors require side oil which can be used up at any time. This oil causes white smoke.

So if your motorbike is a two-stroke motorbike like the RX-King, FIZ-R then don't panic if your motorbike produces white smoke. That is fair thing.

Thus the article about why the motor exits white smoke when heated and the solution. Don't forget to share this article with your social media, so that you indirectly educate them. May be useful.