The whole body of the motorcycle gas pedal is very shaking, what s going on

1. The vibration generated by the mixed air in the combustion chamber during deflagration; Its amplitude is the same as the engine speed. The direction of transmission of vibration is basically along the axis of the cylinder block to the center of rotation of the crankshaft.

2. The motion inertia formed by the reciprocating linear motion of the piston up and down; Its mass is quite high, taking CG150 as an example, when the piston weight is about 193g, the maximum motion inertia of the piston movement can reach kilograms cm. The vibration it forms is often referred to as the first-order kinematic inertia vibration. Its amplitude frequency is consistent with the speed of the engine.

3. The movement of the piston up and down reciprocating in a straight line is converted into rotary motion through the action of the connecting rod and the crank. The axial motion generated during this period also causes vibrations due to the shift of the center of gravity of the crank balance weight. This is what is known as second-order kinematic inertia vibration, which has an amplitude frequency that is twice the speed of the engine.

4. The high-speed rotating moving parts involved in the engine work; Such as magneto, clutch, etc., because of the machining error, the overall mass distribution is uneven, and when rotating at high speed, the mass will be offset, and a certain vibration will also be formed.

It's the relationship between your gears, and if you use one gear and then increase the throttle, it will definitely shock, and it will be very uncomfortable to drive, and it will fall. Start in first gear, control the clutch and throttle, shift to second gear at 10 yards, and ,... 3rd gear at 20 yardsIt is forbidden to have a low-grade high-speed, high-grade low-speed. In first gear, the clutch is slowly released, and the throttle is slowly increased.

Generally, the vibration felt by cycling is mostly due to the obvious vibration of the pedal, because of the suspension structure of the scooter.

Here's why, as well as how to fix it:

1. You open the suitcase, and then take it off to see if the rubber in the hanger position is not installed right or has fallen off, because if this cushioning glue is not installed, it will cause obvious vibration.

2. Disassemble the left and right side strips to see if the frame hanger shaft and hanger bolts are too tight, so that the hanger has no buffering effect at all; It can also cause the tremors to be noticeable.

Motorcycle Maintenance Instructions:

1. Start the vehicle.

When the vehicle starts, it must complete the self-test, and try to do it as much as possible, if an ignition fails, pause slightly, and then ignite again, if it does not ignite three times in a row, then it can not continue to ignite, and the cause should be found.

2. Vehicle preheating.

Whether it is EFI or carburetor, it is necessary to properly preheat it, and when preheating, you must not mix the throttle, let it idle for two or three minutes, and it can be appropriately shortened in summer. The benefit of warm-up is that all parts of the engine can quickly enter into an optimal lubrication state, ready for the normal start and ride of the vehicle.

3. The vehicle starts.

The start of the car is actually not difficult, although it is a bit difficult for novices to cooperate with the oil clutch, but as long as you master the characteristics of the clutch, gentle operation is also easy to achieve. The specific method is to find the access point of the clutch, stabilize it, and then slowly feed the oil, and gently release the clutch to complete the starting operation.

Is the problem you talking about is the footpeg vibrating or the saddle position vibrating? Generally, the vibration of cycling is mostly due to the obvious vibration of the pedal, because of the suspension structure of the scooter, there are several aspects that cause the vibration:

1. You open the suitcase, and then take it off to see if the rubber in the hanger position is not installed right or has fallen off, because if this cushioning glue is not installed, it will cause obvious vibration.

2. Disassemble the left and right side strips to see if the frame hanger shaft and hanger bolts are too tight, so that the hanger has no buffering effect at all; It can also cause the tremors to be noticeable.

The reasons and solutions are as follows:

First, tighten all the screws that fix the engine and check whether the foot fixing screws are loose.

Second, it is necessary to ensure that the concentration of the mixture of the carburetor is appropriate and the ignition time is correct.

3. Check whether the cylinder pressure is balanced.

At present, the domestic small and medium-displacement engines, especially the top rod engines, have relatively large vibrations, which are mainly due to the technical level and processing technology. The reasons may also be: not past the break-in period, carbon deposits, oil problems, etc.

Common faults of motorcycles:

1. Blue smoke comes from the exhaust pipe.

The fault phenomenon of blue smoke is: during the working process of the engine, light blue smoke is often visible at the tail of the exhaust muffler, and the organic oil is consumed too quickly. The reasons for the failure could be:

The oil level is too high; The compression pressure of the combustion cylinder is lower than the specified value; The gap between the piston, piston and cylinder barrel increases.

2. Black smoke comes from the exhaust pipe.

The fault phenomenon of black smoke is: when the engine is working, the exhaust pipe emits black smoke, and can smell the pungent gasoline smell, which is more obvious when accelerating. The cause of the failure can be that Duan Changneng is: the mixture is too thick; The spark plug is not working well; Ignition is too late.

3. White smoke comes out of the exhaust pipe.

The original fault phenomenon of white smoke is: when the engine is working, white smoke comes out of the exhaust pipe. The causes of the failure may be: the fuel contains moisture; There is moisture in the cylinder or muffler.

1. When gasoline is burned, the gas in the cylinder expands rapidly, causing vibration; This may be related to the quality of the gasoline, or the incorrect labeling of the added gasoline.

2. Check whether the clutch is normal; The relationship between the pressure plate of the clutch and the friction plate is that the lips and teeth depend on each other, and when the friction plate has a problem, it will accelerate the wear of the pressure plate and even the flywheel, which is mainly manifested as difficulty in gearing, unclear separation, and trembling at the start.

3. It may be that the clearance of the engine's cam, rocker, valve, etc. is too large, or some bearings or bearing seats are broken.

1. It may be that the engine has a failure of missing cylinders, resulting in one or more cylinders not working, so the engine shakes badly and is transmitted to the accelerator pedal, and the general failure points of the missing cylinders are: spark plug failure, ignition module failure, gasoline quality is not good, etc.; 2. It may be that the throttle valve of the engine is too dirty, causing the engine to shake, it is recommended to check the lower throttle, if it is very dirty, you need to clean the lower throttle.

3. It may be that the aging of the rubber parts inside the engine and transmission bracket causes this part to be unable to absorb the shake when the engine is working, so the shake will be transmitted to the accelerator pedal;

4. It is recommended to observe whether the engine speed is too low, that is, the oil separation coordination phenomenon, if the engine speed is too low, it means that the engine shake formed by the clutch timing is too early, which should have nothing to do with the design.

You can also check the rotating and stressed moving parts, such as tires, the working condition of the front left and right half shafts, as well as the condition of the transmission shaft from the transfer case to the rear reducer, and whether there is obvious chassis anti-rust coating during construction.

Photo by Brother Choosing a Car) @2019