What causes the motorcycle engine to be unparalleled? How should it be repaired?

The landlord said that there is no parallel gas refers to the insufficient pressure of the engine cylinder, the main reason for this situation is that the piston ring is seriously worn or the oil is not enough to pull the cylinder, but it does not mean that there are no other factors, and the valve wear is more serious, resulting in valve leakage, the valve clearance is too small, and the cylinder gasket damage will also lead to insufficient cylinder pressure, plus a little bit, that is, the small chain jumps the grid and causes the ignition time to be incorrect. If you have any symptoms, it is difficult to start, especially in winter, if you are a men's car, there is obviously no resistance to stepping on the starting lever, and it is easy to step down. How to repair, first use the cylinder pressure test table to test whether the cylinder pressure is insufficient, if you are sure, you can disassemble the engine, first look at the valve, if there is no air leakage, check the cylinder head gasket, and then look at the piston ring, there is always one thing that is broken.

I hope the landlord's car can be repaired.

Oh, this should be seen from different aspects, whether the piston ring is normal, the early opening and closing angles of the intake valves, the early opening and closing angles of the exhaust valves must be adjusted according to the regulations, and the oil model, of which the former accounts for the main reason, should be considered first to check.

The motorcycle has no pressure, and the problem is caused by several reasons: first, the locomotive has no oil to pull the cylinder; second, the valve clearance is improperly closed and not tight; Third, the cylinder seal in the locomotive is not tight, please focus on these three aspects.

Is it not a feeling to step on the starting lever

What does it mean to be unharmed, maybe we don't say it the same as yours, you explain the problem in more detail.

Engine parts may have problems, the valve is the same, but also a position with a high failure rate, difficult to start a cold car, difficult to start a hot car, high idle speed, weak driving, this is a process, there are many reasons, there are adjustment problems, there are also manufacturing process problems, in general, the use of mileage will not be less than 20,000 kilometers, this is the lowest standard, there are problems are basically after 20,000 kilometers, some will be a long time, tens of thousands of kilometers can be, supplement, imported cars are obviously better than domestic cars, obvious gap,

The valve of the motorcycle will fail, mainly because the valve clearance is too large or too small, and the valve is not closed tightly due to wear and ablation.

Valve failure, not only due to its own quality and maintenance, but also due to inevitable natural wear and tear. The common faults of the valve are mainly due to wear and ablation caused by long-term use, and the loose closure caused by improper adjustment of the valve clearance (too small clearance), and the knocking noise caused by improper clearance.

It is not certain how long or how many kilometers the valve will be damaged when the motorcycle is used. Different models of motorcycles, different quality and technology, different use and maintenance, etc., will lead to differences in the degree of damage and time. Some may have problems for thousands of kilometers, some may be fine for tens of thousands of kilometers, there is no absolute standard in this regard, even if it is the same car, different people use it, the wear and tear of engine parts including valves will be different, when there is a problem when to repair or replace it.

Power declines, serious difficulty in starting, idle speed is obviously high and can not be lowered, meet these three conditions can be determined, more specifically, the power is obviously reduced, driving is weak, it is difficult to start with serious difficulties in starting to the hot car stalling, obviously high idle speed of more than 1500 and cleaning and adjusting the carburetor is invalid, tips, remove the spark plug, block the spark plug hole with your fingers to start the machine to test the pressure state, and then drop a few drops of oil into the spark plug hole, block the spark plug hole with your fingers, test the state, the former is obviously no pressure, The latter pressure becomes significantly larger, considering maintenance,

The valve of the carburetor of a motorcycle is generally less problematic, and the valve of the carburetor of a straddle motorcycle is fixed and has three gears. The scooter carburetor valve is active, that is, the throttle line is controlled.