If you notice that your scooter is smoking like a steam locomotive, you can buy a reliable scooter from another manufacturer or repair the old one. Technics cannot stop smoking, because in any case, the engine burns fuel. And residues and combustion products are discharged outside through the exhaust pipe. But if a malfunction occurs inside the device, the color of the exhaust can "tell" where to look for the root cause and what to repair first.
Scooter device in general
As you know, the traction force of a scooter is the internal combustion engine - an internal combustion engine. For its operation, a uniform supply of the fuel mixture and periodic sparks are required. The fuel in the carburetor is mixed with a certain amount of oxygen, and then sucked into the engine cylinders, where it is compressed using pistons. When the mixture ignites, the pistons are pushed out and propelled the crankshaft. The combustion products or exhaust gases are discharged through the exhaust valve in the piston into the gas distribution system, and then through the exhaust pipe to the outside.
If something in this sequence does not go according to plan, it affects the quality and quantity of exhaust gases. And the scooter starts to smoke. And it also affects the work of the engine itself. Therefore, it is not worth ignoring the puffs of black or bluish smoke from the scooter, this may precede serious damage to the unit. And require a significant investment in repairs.
The scooter started to smoke: what to do?
The first thing that the owners of all scooters, without exception, sin on is the quality of the fuel mixture. Unfortunately, not all gas stations sell really high-quality gasoline, so you need to refuel your vehicle from reliable sellers who value their reputation.
If you are sure that you have poured normal fuel into the tank, and the scooter is smoking a lot, we continue to look for the reason:
● we check all elements of the fuel system - pipes, hoses, rings, caps;
● we clean the filter that allows air to pass through;
● make sure that the vent hole in the carburetor is free and allows enough oxygen to flow into the fuel mixture;
● check if there is any plastic shavings in the carburetor (especially in brand new Chinese scooters) and other debris that acts like a cork.
If the scooter smokes and stalls, you should pay attention to the GDS and exhaust valves. Perhaps. somewhere there is wear of parts or deformation that affects the combustion of fuel and the output of mining.
If a scooter with a 2-stroke engine smokes:
● we look into the crankcase and the muffler, perhaps a large amount of oil accumulates there, which simply does not burn;
● check the oil pump and oil level, remove excess;
● inspect the piston for wear.
It happens that the scooter runs on an excessively enriched fuel mixture and therefore smokes. If you have carried out diagnostics and have not found any problems, you can safely ride, leaving behind a smoky trail.
Why does a 4-stroke scooter smoke? The vehicle owner may have such a question if:
● too rich mixture is supplied to the engine;
● there is a defect in the oil scraper rings;
● the oil is not suitable for the unit - too viscous or too liquid, mineral water instead of synthetics;
● exhaust valve oil seals are worn out;
● there is a breakdown on the cylinder head gasket.
It is worth looking for the root cause in the carburetor if the scooter smokes black smoke. If the exhaust is blue, then the problem is in the lubricant. Most likely, large quantities of oil enters the combustion chamber and simply does not have time to burn. And if the scooter smokes with white smoke, this may be a completely normal situation, or it may indicate that an excess of liquid has entered the carburetor.
To prevent this from happening, contact a specialized scooter store, whose consultants will help you choose reliable and durable equipment.