The decrease in average temperature of these components can increase within certain limits the degree of compression or pressure feed, not fearing the appearance of detonation. For small cylinders easier to deal with increasing stresses in progressively moving parts. For these reasons, the highest-liter capacity with sufficient precision ¬ reliability of the motor with a small volume of each cylinder. Minimum working volume of the cylinder in the common classes of motorcycles is about 62 cm / liter. The minimum volume of the cylinder determines the number for a given displacement. Engine 500 cm3 cylinders are 8.1, 250-350 cm 3 - 1-4 cylinder, 125-175 cm 3 - 1-2 cylinder. Nevertheless, until recently, any race classes 125.250, 350 and 500 cm3 were many single-cylinder engines. The positive qualities of multi-cylinder engines include their steadiness and uniform torque momeng. These properties help to calm the course of a motorcycle and reduce vibration at high speed.
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