What s so bad about a motorcycle with an expanded cylinder?

With the expansion of the motorcycle cylinder and the upgrade of the original displacement, some of the original accessories will not be so suitable! If other accessories are not further modified, the car will be damaged.

This is a very dangerous modification. And it will greatly shorten the life of the engine.

To put it bluntly, cylinder expansion is to use a machine to grind the inner wall of the cylinder very finely, and the size that can be expanded varies from car to car. As long as you don't grind the cylinder through, you can replace it with a piston of the corresponding size.

This is the ultimate way to increase horsepower. Under normal circumstances, it will not be used, because the inner wall of the cylinder is partially thinner after grinding, and the pressure of the cylinder is uneven, which is very easy to burst.

Also known as pulling cylinder. If it's to increase the horsepower, there are many, many ways, such as changing the exhaust to adjust the ECU + Turbo and so on.

But if it's for other reasons, like I used to know some boys. The cylinder of a Halma 125 has been expanded by almost a full centimeter, and the acceleration is almost unmatchedBut that 125 was scrapped after driving less than a kilometer.

Just kidding, the power definitely strengthens after the expansion of the cylinder. Now a lot of 125 has expanded to 150 or even higher. After the cylinder is expanded, the bore is larger, the exhaust volume increases, and the power will inevitably increase.

It's just that after the cylinder is expanded, the cylinder volume increases and the combustion chamber volume remains unchanged, and the compression ratio will increase, which may cause detonation Suggestions: 1, find a professional person to help you expand, expand the combustion chamber 2, readjust the oil converter 3, run in well 4, it is best to add an oil cooling (the heat is large) 5, change the oil.

In fact, it is still the same as the original. It's just that the bore cylinder is not as powerful as the previous engine after that. This phenomenon is taken in the absence of accessories.

It will lead to low operating efficiency and fuel consumption, and the higher the speed, the more fuel is consumed.

The valve must be increased at the same time, the breathing is smooth, and the high speed efficiency is in place.

If you don't increase the valve, then it can only be expanded to about 180, and the effect obtained is that the power at low rpm increases, and the power at high rpm increases slightly

The general 150 expanded cylinder finished car, without increasing the valve, only increases the cylinder volume, then only 175 ml. And the use is mainly in the mountainous plateau, low-speed driving.

For example, a small-valve engine with a displacement of 110 can only reach a maximum speed of 80 per hour, and a slightly more violent driving than a normal valve engine with a displacement of 2 liters ,,, 90 displacements per 100 kilometers has a maximum speed of 85 per hourWithin 100 kilometers of liters.

The weight of the piston is increased, but the valve is not thickened, so you can't breathe at high speed, and increasing the throttle is not too high. The piston runs at high speed, and a lot of energy is wasted.

If the lung capacity is increased and the nostrils are not thickened, can it be used? Can I gasp faster?

If the heart is enlarged and the blood clot is not unblocked, can the heartbeat be accelerated? Increasing the heartbeat is high blood pressure

I expanded to 180, and I estimated that the maximum would not exceed 200, because the connecting rod was overloaded and easy to break.

After the motor vehicle is in the household, no matter how you modify it, it is illegal.

First, for example, it is illegal for some trucks to post some advertisements on the compartment, and if they are to be dealt with strictly, they can also be fined. It is definitely illegal for a motorcycle to change its exhaust pipe, and the traffic police department can remove your illegal device and impose a certain amount of fine. If you really need to modify your vehicle, you can go to the DMV where you have gone through the household registration procedures to apply for the change without affecting the overall structure.

2. Violating the law: refers to the conduct of state organs, enterprises, public institutions, social organizations or citizens who are suspected of violating the provisions of the law, resulting in the destruction of social relations and social order protected by the law, and shall bear legal responsibility in accordance with the law. Illegality refers to the state in which a specific subject commits an act of waiter that conflicts with the existing law, causing the corresponding damage facts, and the law conducts a negative evaluation of it.

This is a violation of the law as one of the reasons for the occurrence of legal liability.

Changing the cylinder in the motorcycle has an effect. Increases fuel consumption, increases crankshaft and valve load, and reduces cylinder compression ratio. Because the surface of the mating parts cannot be machined to a completely ideal state, there is a certain deviation in the mutual position.

The moving parts rub against each other violently, generating intense heat. If the stool is not used carefully, it may damage the friction surface and seriously affect the performance and life of the motorcycle.

Control the speed: grind and disassemble the posture in strict accordance with the different speeds specified in the operating instructions. Control overload, control the load within two percent of the maximum load of the car during the run-in period, and choose to drive on a better road.

Avoid running the engine for long periods of time. Change the oil frequently. The metal chips in the running-in process can be taken away in time. It is recommended to change the oil three times during the run-in period.

Millions of car purchase subsidies.