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motor scooter:see motorcyclemotorcycle,
motor vehicle whose design is based on the bicycle. The German inventor Gottlieb Daimler is generally credited with building the first practical motorcycle in 1885. The motorcycle did not become dependable and popular, however, until after 1900.
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a variety of motorcycle that provides greater comfort for the driver. A front guard that extends downward to broad footrests protects the driver and passenger from dust and mud. Increased ease of mounting for the driver is provided by under-seat location of the engine, which is covered by a housing, and by the use of wheels that are smaller than those of a motorcycle. The main shortcomings of motor scooters are limited performance on unpaved roads and poor stability when traveling on an uneven road.
The engine of a motor scooter is usually a two-cycle, single-cylinder type with forced-air cooling (with a fan). Most engines have an electric starter. The maximum speed is 70–95 km/hr. Mass production of motor scooters began late in the 1940’s (in the USSR, in 1957). In the early 1970’s, production in foreign countries was reduced because of low demand; it ceased in 1972. In the USSR, motor scooters are manufactured in plants at Tula and Viatskie Poliany (see Table 1); the output in 1973 was 140,000. Three-wheeled vehicles have been developed from motor scooters for loads of 100–150 kg.
|Table 1. Specifications of Soviet motor scooters|
|Viatka Turist V-150M||Turist|
|Engine displacement (cu cm)..........||148||199|
|Maximum power at 4,800 rpm, kW (hp).........||4.42 (6)||8.24 (12)|
|Maximum speed (km/hr).........||70||90|
|Number of speeds.........||3||4|
|Tire size (inches)..........||4.00 × 10||4.00 × 10|
REFERENCESGruzovye motorollery, 2nd ed. Moscow, 1969.
Volkov, A. T. Remont motorollerov, 2nd ed. Moscow, 1967.
S. Iu. IVANITSKII and B. V. SINEL’NIKOV