Many owners of scooters with four-stroke engines know that you need to adjust the valve clearances.But inexperience and ignorance are not paying the necessary attention to this procedure.And for good reason.By adjusting the valves on your engine, you will not only improve the stability of his work, but also extend the service life.It may seem that a few fractions of a millimeter is not much effect on the operation of the scooter.
However, practice shows that are too small or too big valve clearances accelerate engine wear several times, helping to reduce the time of his work at times.Let us answer the question of why this is happening.
considered normal valve clearances for scooters (engine capacity 50-100 cm3) of about 0.05 mm.This value is the same for both exhaust and intake valve.However, if it is increased, then the engine starts knocking.At the hearing at idle, such as the operation of the engine is heard tarahtenie sewing machine.
But the trouble is not the case.Increased heat valve clearances shift timing.Therefore, when you add the engine rpm is reduced thrust scooter, increases fuel consumption and valve train wear.
When the valve clearances more than necessary while the engine is in an even worse state.After a loss of compression from the gaps being heated, become even smaller, thus opening the valve.There is a blow-by and power loss.It may also be a valve or burn through its seat.
After all this trouble scooter stops good move.He lost the power and soot blackened by candles.Therefore, there is nothing left to do, how to replace valves or even the entire head entirely.
Better once a thousand kilometers to adjust the valve clearances on a scooter than buying new parts.To do this (for example, Alpha and Delta), we need such tools:
- a set of keys;
- a set of probes;
- pliers.
But do not forget that the control valve when the engine is cold (when the temperature is below zero, then it is heated slightly).The process of working is reduced to the following operations:
- Screwing out the candles.
- Installation of the piston at top dead center (the end of the compression stroke), releasing these valves.To check, unscrew the cap and on the cover of the crankcase, turning the crankshaft to ensure that the label "T" is exactly in the middle of the hatch.With key unscrew the plug and turning the screw on the yoke, to make adjustments.This operation must be done carefully so as not to damage the propeller, which is often plastic.Probe to measure the gap that at a thickness of 0.04 mm should pass freely, while 0.06 never prolazit.Probe 0.05 mm should go to work.
- Tightening of all plugs and spark back into place.
That's all.As you can see, there are no special secrets.Now you can start and warm up the engine.When properly adjusted, you immediately identify by ear as was the quieter work your scooter and how pleasant it go.
