That is the engine running too lean (lack of fuel). This condition will lead to overheating and failure of the engine.
i think it is because the lubricating oil in the cylinder is burned with the fuel.
Two stroke engines will create a lot of visible smoke pollution and also more noise than four stroke engines. For these reason, many countries have required that all new motorcycles should be four-stroke.
A 2 stroke engine requires you to mix 2 cycle oil in with the gasoline. This requires more money, and it is much more trouble to have oil with you every time you fill the gas tank up. A 4 stroke engine only requires oil in the lower part of the engine, and it burns gasoline right out of the gas station pump. 2 cycles also pollute very bad, as the blue smoke that is a characteristic of them is bad pollution.
2 stroke engines burn a mixture of oil and gas. The smoke, typically blue, comes from the burning of that oil in the fuel.
A MThB EC 3/5 no. 3 with the smoke box door+smoke deflectors+ snowplows from the DSB R 963.
There is never a safe way to smoke a cigarette. Smoking causes a variety of health problems including lung cancer, emphysema, stroke, and bronchitis.
4 stroke engine is used in cars to give them more power. Or The four stroke system does not have to have oil mixed in with the fuel, because the sump can be used for storage and pumped around galleries. Two stroke engines are less convenient and also cause pollution, due to the unburnt oil causing smoke. Some eastern block cars used to have 2 stroke engines, like the Trabant and Wartburg.
Two cycle engines have an oil gas mixture and if there is too mush oil to gas you will see it burn as white or gray smoke That or your valves are bad.
Blue smoke indicates the engine is burning oil. If it is a 2-stroke, the fuel/oil mixture has too much oil. If it is a 4-stroke, there is too much oil in the reservoir or the valve seal are leaking, or the piston rings are worn.
Usually that's oil left in the combustion chamber. That is, if it's happening only when you start the engine
what is the causes of smoke belching
The smoke.
Harold Bonnett has written: 'Snippets of South Africa' 'Saga of the steam plough' -- subject(s): Plows 'Farming with steam' -- subject(s): Farm engines, History, Steam-engines 'Smoke and steam!' -- subject(s): Biography, Great Northern Railway (Great Britain), Locomotive engineers, London and North Eastern Railway