Aerospace Cycling

All answers for Motorcycle



Question: What Causes Blue Smoke From Motorcycle Exhaust

Blue smoke is a result of spark plugs being contaminated with a rich fuel/air mixture from the cylinders. This is indicated by a shiny and black layer of excess oil on the plugs. Worn out piston rings or valve seals results in the oil from leaking out of the cylinder, which also causes blue smoke.

Why is my motorcycle blowing blue smoke?

Blue smoke means that the engine is burning oil. This usually happens because the piston, rings, and/or cylinder is worn out of spec. Every engine burns at least a small amount of oil over time due to necessary clearances.

How do you stop blue smoke from exhaust?

Clean The Engine. A clogged cylinder head can cause blue smoke. To clean it, remove the valve cover, and do the necessary cleaning. Also, clean the drain back holes carefully and recheck and reassemble them. After all of this, wait for 2 or 4 more days for the remaining oils to clean away.

What does blue exhaust smoke indicate?

Blue/gray exhaust smoke means there’s likely an oil leak and your engine is burning oil. Time to have a qualified technician check things out. The leak could be caused by several issues like leaking valve seals, damaged piston rings, or worn cylinder walls.

How do you know if your motorcycle is burning oil?

Blue smoke exiting the exhaust pipe after the engine has warmed is a sign that oil is burning in the combustion chamber. Oil can enter the combustion chamber past the valve stem seals or pistons rings, so if this symptom persists then one of these components may be compromised.

Is it normal for a motorcycle to smoke?

Having smoke come from your motorcycle isn’t a rare occurrence among these types of machines. In fact, it’s almost pretty common, especially with older motorcycles. But it can be scary when you see it and you’ll probably want to fix it quickly because it’s also pretty embarrassing.

Will bad injectors cause blue smoke?

Can faulty injectors cause blue smoke? This can be caused by worn/leaking injectors or restrictions in the air intake system. Blue smoke is normally the result of engine oil entering & burning inside the combustion chamber. This is most often caused by low compression, or worn piston rings.

Can low oil cause blue smoke?

Oil leaking into the cylinders can cause a rough idle, misfire and fouled spark plugs. In addition, a reduction in power and oil loss can be indicators that the blue exhaust smoke is caused by an internal engine oil leak.

Will thicker oil help blue smoke?

No it won’t reduce the smoking. Heavier weight oil will increase the oil pressure as long as the oil is cold but as soon as it warms up, you’re back to square one.

How bad is blue smoke from exhaust?

Blue smoke from a car exhaust is generally a bad sign, and the cause of it will need to be repaired as soon as possible. In petrol cars, it might suggest that oil is leaking into the engine block where the fuel is mixed with air, while in diesel cars it may simply suggest that there is too much oil in the engine.

Can a bad EGR valve cause blue smoke?

The exhaust gas recirculation (EGR) valve might be sticking occasionally and ti can give you blue smoke, when it sticks open it allows in spent exhaust gases which interfere with the combustion process but usually gives other symptoms like rough idle and possible EML warnings.

What does Blue exhaust look like?

Blue smoke can often look like grey smoke at first. But if you notice a distinctive bluish tint, it may signal that the engine is burning lots of oil. This could be due to worn engine components like piston rings, valve seals, or PCV (Positive Crankcase Ventilation) valves.

What are the signs of worn piston rings?

Common Symptoms of Damaged Piston Rings White or gray exhaust smoke. Excessive oil consumption. Low power for acceleration. Overall loss of power or poor performance.

How can you tell if you have bad piston rings?

When drivers notice excessive oil consumption, white or gray exhaust smoke, poor acceleration, and/or overall loss of power or poor engine performance, they may be seeing signs of worn piston rings.

How do you know if your motorcycle piston rings are bad?

Excessive smoke If the smoke coming out of your engine is grey in colour and particularly thick, then it could mean your piston rings need replacing. The bad rings allow oil to leak and burn, resulting in incomplete combustion and smoke.

Why does my bike smoke when I start it?

When an old engine smokes on startup it’s often a symptom of worn valve guides – oil trickles down ’em into the ports when the engine’s not running, then gets burned when you fire it up. When this is the case they usually also smoke when you crack open the throttle after the engine’s been on the over-run.

Where is the head gasket on a motorcycle?

Riding With A Blown Head Gasket Your head gasket performs a very critical function on your motorcycle. It serves as a seal between the cylinder head and the engine block. This seal allows coolant to flow through small engine passages and for oil to flow around all the moving parts for lubrication.

Can wrong engine oil cause smoke?

Using synthetic oil in the wrong engine can cause gaskets and seals to leak. Oil leaks accumulating under the car and white smoke coming from the exhaust could be signs that you’ve used the wrong oil.

What are the signs of a bad fuel injector?

Here are a few signs there might be something wrong with your fuel injectors. The Engine Misfires. Dirty fuel injectors may cause your vehicle’s engine to misfire. Idling Gets Rough. Your Gas Mileage Tanks. The RPM Needle Starts to Dance. Your Car Won’t Start.

Do bad fuel injectors cause smoke?

A Faulty Fuel Injector Without getting too technical, the injectors that deliver the fuel to the combustion chamber can leak or become stuck in the open position. This means too much fuel in the engine that needs to burn off and be expelled. This is seen as gray or white smoke from the exhaust.

Can a bad fuel pump cause smoke?

injector pump timing is the most common cause of white smoke. White smoke will result from incomplete combustion if the fuel delivery is delayed or the pressure is decreased. A worn out timing gear can cause the incorrect timing.