Lubricants, the purpose of which is to ensure the performance of the motor and gearbox, differ in component composition, viscosity index and other important physical and technical characteristics.
Scooter engines, originally only two-stroke, in modern mototechnics have invariant principles of work. On the mobile city transport, four-stroke engines are increasingly installed, especially in the technology released in China.
The principle of lubrication of the bearings of the crankshaft and the cylinder-piston system, in motors with two and four cycles of operation, is very different.
The closed design of the grease of the contacting elements of the four-stroke engine assumes the pouring of lubricants, the physical and technical parameters of which guarantee a long period of operation without loss of their main properties. In scooters with two-stroke engines, high performance results, on the contrary, give oils that can burn in the combustion chamber of an internal combustion engine without generating excessive volumes of soot components. The oil for the scooter during combustion should not be accompanied by a large amount of emitted smoke.
The oil viscosity index should ensure the preservation of its qualities at a positive air temperature.
What oil to pour into a scooter with a four-stroke engine? The answer is quite simple – the one recommended by the powerplant manufacturer. However, the Chinese scooters common today are equipped with motors that are built far beyond the Celestial.
Motors dropped from production in Japan or the US 10-15 years ago, as well as engines of Korean production. It is rather difficult to find in the constantly updated nomenclature series of lubricants exotics of a decade ago. In this case, you need to follow a fairly simple rule. A good scooter oil should ensure the formation of a tight separation film under conditions that accompany the use of the engine. These conditions include:
- ambient temperature
- level of the constantly acting load on the unit
- the life of the internal combustion engine.
Scooters are used mainly in the warm season. While the viscosity that the lubricant must be filled with, must guarantee the retention of the parameters only at a positive or slightly negative ambient temperature. According to the SAE classification, these groups include oils of class 5W30, 10W40 and 10W50. It is these oils that recommend the use of most manufacturers and experienced users for four-cycle scooters.
Two-stroke scooter motors can be lubricated in two ways. The first method is the standard lubrication for most of these engines, preliminarily dissolved in gasoline with oil.
Today, the engines have a separate injection of oil and fuel into the space behind the carburetor. The next way is much more rational. In addition to reducing the consumption of lubricant, the motor operates under more favorable conditions for the combustion of the fuel mixture. In conditions of idle rotation, the proportion of the mixture of oil and fuel reaches 1: 200.
However, the general rule for any operating conditions of a two-stroke ICE should be oil, which is marked with the 2T index. The process of separate supply of oil and fuel requires an instant and qualitative mixing of the components. Therefore it makes sense to use lubricants that have the label "self mix", meaning independent and rapid mixing with the gasoline-air mixture.
According to API classification, the lubricant is selected from the TA or TV classes, because it is suitable for use in two-stroke scooters , mopeds and garden equipment.
Today, scooters practically do not find a gearbox in its traditional sense – with a manual mechanical switching system. The speed control, which the engine transmits to the wheels, is carried out by variators of different design. The variator system assumes the addition of the transmission of scooters with reducers.
There is no need to use additional additives, because in the composition of high-quality gear oils there is a full complex of additives gears needed to provide effective lubrication, full
How much oil is in the scooter? There is no unequivocal answer to this question, each scooter needs a different amount of oil, however, applying the golden rule, one can know the volume of the necessary oil.After draining all the oil from the crankcase, its volume The amount of oil to be poured should be equal to the volume drained plus 3-5% In the case of a new scooter, you can not add 3-5%, but fill as much as it was drained.