Air door problem of Tian Jian K motorcycle

If you say that it is easy to turn the damper in which direction, you might as well put it another way. Tian Jian K's carburetor air door adopts the thickening principle, that is, when the air door is pulled, the fuel injection will increase. You can observe that when you pull the throttle, there is a small copper column sticking out of the carburetor at the root of the throttle, which is the shock absorber. This should be the case when the cold car starts. When the throttle is closed, the small copper column at the root of the throttle is pressed into the carburetor, which is the normal driving state after preheating.

When a cold car starts, it needs a thick mixture, so it needs ventilation, while when it is hot, a thin mixture is enough. Too rich mixture will affect the power, leading to fuel consumption and engine overheating, so there is no need for shock absorbers. If the air door is not pulled when the cold car is started, it will be difficult to start because the mixture is too thin. If the mixture is artificially enriched, although the starting performance will be improved when the car is cold, it will consume oil when driving normally after the car is hot.

The cylinder compression of the new car has not reached the best, and the internal parts of the engine are tight, which will increase the difficulty of starting the cold car. In addition, it is necessary to warm up the cold car, because the oil is deposited at the bottom of the engine at this time. If you drive on the road without preheating after starting, it will increase wear and tear due to poor lubrication, and it is easy to stall or fail to add oil because of insufficient combustion of the engine when the car is cold.