2024 Author: Erin Ralphs | [email protected]. Last modified: 2024-02-19 11:41
Many four-stroke scooter owners know that valve clearances need to be adjusted. But due to inexperience and ignorance, they do not pay the necessary attention to this procedure. But in vain. By adjusting the valves on your engine, you will not only improve its stability, but also extend its life. It may seem that a few fractions of millimeters do not have much effect on the performance of the scooter.
However, practice shows that too small or too large valve clearances accelerate the wear of engine parts by several times, helping to reduce its operation time by several times. Let's answer the question of why this is happening.
Normal valve clearances for scooters (engine size 50-100 cm3) are about 0.05 mm. This value is the same for both the exhaust and intake valves. However, if it is increased, then the engine starts to knock. To the ear at idle, such engine operation is heard as the rumble of a sewing machine.
But that's not the trouble. Increased valve clearances shift the phasesgas distribution. Therefore, when the engine speed is added, the traction of the scooter decreases, fuel consumption and wear of the valve mechanism increases.
When valve clearances are greater than necessary, then the engine is in even more deplorable condition. After all, there is a loss of compression from the fact that the gaps, heating up, become even smaller, while slightly opening the valves. There is a breakthrough of gases and loss of power. The valve or its seat may also burn through.
After this trouble, the scooter generally ceases to move well. He loses power and candles turn black from soot. Therefore, there is nothing left to do but to replace the valves or even the entire head.
It is better to adjust the valve clearances on a scooter once every thousand kilometers than to buy new parts. To do this (for example, for Alpha and Delta), you need the following tools:
- set of keys;
- set of probes;
- pliers.
But do not forget that the valves are adjusted when the engine is cold (when the air temperature is below zero, then it is warmed up a little). The work process is reduced to the following operations:
- Twisting the candle.
- Installing the piston at TDC (end of the compression stroke), thereby releasing the valves. To control this, it is necessary to unscrew the plug on the crankcase cover and, turning the crankshaft, ensure that the "T" mark is exactly in the middle of the hatch. Using the wrench, unscrew the plug and,turning the screw on the rocker arm, we make the adjustment. This operation must be done carefully so as not to damage the screw, which is most often plastic. They measure the gap with a probe, which, with a thickness of 0.04 mm, should pass freely, and at 0.06, it should not climb at all. The 0.05 mm probe should be difficult to enter.
- Screwing all plugs and candles back into place.
That's it. As you can see, there are no special secrets here. Now you can start and warm up the engine. With the correct adjustment, you will immediately determine by ear how quieter your scooter has become and how pleasant it is to ride.
Recommended:
The hood of the VAZ 2114 does not close: we adjust ourselves
VAZ 2114 owners often encounter a problem when the car's hood starts to close and open poorly. This creates a lot of inconvenience. After all, a poorly functioning mechanism not only deprives the pleasure of operating the machine, but can also unexpectedly lead to an emergency
How and why you need to adjust the idle speed of the engine
The article discusses the main reasons why a car engine may not work at idle. In some cases, simple solutions are given that you can fix with your own hands
Adjusting wheel alignment. How to adjust wheel alignment yourself. Wheel alignment stand
Today, any service station offers wheel alignment adjustment. However, car owners can carry out this procedure on their own. So they will learn to better understand and feel their car. Auto mechanics unanimously argue that it is extremely difficult to set up a wheel alignment on your own. Actually it's not like that
How to properly adjust the valves on the car?
Every car needs periodic valve adjustment. If this is not done on time, the car will begin to lose its traction, the drive will begin to make noise and the load on the rest of the internal combustion engine will increase. To prevent this from happening, it is necessary to adjust the valves in a timely manner. Learn how to do this in today's article
How to adjust the clutch on VAZ cars of various models
Every driver should know how to adjust the clutch on their car. This procedure must be carried out when the disc and clutch basket are changed, as well as when these elements are excessively worn. The movement of the car along the highway occurs almost always at a constant speed, gear shifting is very rarely carried out