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Ducati Cucciolo 1950-1951 with a 48 cc Ducati engine. In 1952, with 200,000 Cucciolos already sold, Ducati finally offered its own complete moped based on the successful little pull rod engine, removing the pedals and adding a 3 speed gearbox, creating the model 48 (produced until 1954) and model 55E and 55R. Siata-Ducati Cucciolo 50, 1946. [4]
Motorcycles with a V-twin engine mounted with its crankshaft mounted in line with the frame, e.g. the Honda CX series, are said to have "transverse" engines, [1] [2] while motorcycles with a V-twin mounted with its crankshaft mounted perpendicular to the frame, e.g. most Harley-Davidsons, are said to have "longitudinal" engines.
The GY6 engine design is a four-stroke single-cylinder in a near-horizontal orientation that is used on a number of small motorcycles or scooters made in Taiwan, China, and other southeast Asian countries. It has since become a generic technology.
Whizzer bicycle engines are a line of bicycle engines that were produced in the United States from 1939 to 1965. They were commonly sold as kits to be assembled and attached to a consumer's bicycle thus creating a motorized bicycle. Whizzer U.S.A. re-appeared in 1997 to sell an improved version, pre-assembled on an old Schwinn-style bicycle frame.
1946: A 45 cc model, of which many evolutions were made, with a 45 cc (2.7 cu in) engine developing 0.4 hp (0.30 kW) and no clutch, the engine has to be restarted every time the rider comes to a stop 1953: Model 330 with a 49 cc (3.0 cu in) engine and 0.5 hp (0.37 kW) using the same frame as the 45 but boosting power
Produced from 1961 onwards, the Honda 50 Sport (type C110 and C111) variant of the Super Cub, laid out the basics of all future models: It had a pressed-steel frame, hydraulic front and rear forks, a 49 cc (3.0 cu in) OHV four-stroke engine. The cylinder was laid horizontally to optimise cooling.
In the early 1970s, bicycle demand continued to increase, prompting Batavus to expand the factory to 25,000 square meters. [2] Moped demand declined, and although there was a significant increase in moped popularity in the USA during the fuel crisis of the 1970s, Batavus built and shipped the last moped in the early 1980s.
The amount of power generated by a piston engine is related to its size (cylinder volume), whether it is a two-stroke engine or four-stroke design, volumetric efficiency, losses, air-to-fuel ratio, the calorific value of the fuel, oxygen content of the air and speed . The speed is ultimately limited by material strength and lubrication.
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