An important structural element of a gasoline internal combustion engine is spark plugs. They are designed to ignite the combustible mixture in the cylinder. It is this process that is fundamental to the operation of the engine. It would have been impossible without candles.
Spark plugs for scooters with a two-stroke engine
To use one type of spark plug or another, deal with the engine model installed on the scooter. Older models had a simplified two-stroke engine. Domestic motors had a similarity to this. The displacement of these engines is very small. Less than the current standard of fifty cubic meters.
The cylinder has a motorcycle shape, but smaller, commensurate with a chainsaw or trimmer. An ordinary motorcycle plug of a standard diameter is screwed into such a cylinder. The base of these candles is small, because the two-stroke type of engine uses a mixture of gasoline with a low octane number, for example, seventy-six or eighty, and a special two-stroke burnable oil.
You can also use a candle with a long base - "Zhiguli". Just before use, screw a few O-rings, about four or five, onto the base. These spark plugs give out a spark of more power, as they are intended for use on cars.
Use smaller plugs on newer two-stroke scooter models. They appeared not so long ago, especially for such engines. The diameter of the candle is much smaller than the standard one, the base is elongated. An important feature of such candles is that it is impossible for them, as in the previous version, to find an alternative. The size of the thread in the cylinder allows the use of only such candles and no more.
The positive side of this situation is the impossibility of making a mistake when choosing a spark plug, the negative side - the low level of the range does not allow upgrading the vehicle. It will only be available after replacing the engine piston component. Refuel such scooters with gasoline with an octane higher than eighty. Observe the proportions of adding oil to gasoline, otherwise soot will settle on the candle.
Spark plugs for scooters with a four-stroke engine
For four-stroke engines, choose a plug similar to the previous one, only with an even larger base. To use such a scooter, there is no need to fill it with a combustible mixture. It runs on pure gasoline. There should be only one O-ring on such a candle.
The same spark plug is used not only on scooters, but also on some small Japanese motorcycles. Their engine capacity is on average from one hundred twenty-five to two hundred cubic meters. The efficiency of such candles is higher, but the service life is much shorter. With regular use of the vehicle, the central electrode on the candle burns out in a year and a half.
