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2. Whizzer (motorcycles) - Wikipedia

   en.wikipedia.org/wiki/Whizzer_(motorcycles)

   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.

3. Motorized bicycle - Wikipedia

   en.wikipedia.org/wiki/Motorized_bicycle

   A motorized bicycle is a bicycle with an motor or engine and transmission used either to power the vehicle unassisted, or to assist with pedalling. Since it sometimes retains both pedals and a discrete connected drive for rider-powered propulsion, the motorized bicycle is in technical terms a true bicycle, albeit a power-assisted one.

4. RevoPower - Wikipedia

   en.wikipedia.org/wiki/RevoPower

   In order to fit the entire engine inside the Wheel, it was designed using SolidWorks to deal with the technical challenges of building an engine in a bicycle's wheel. [9] The engine is a 25 cc (1.5 cu in) two-stroke cycle design, capable of producing 1 horsepower (0.75 kW), and doing up to about 20 miles per hour (32 km/h) on level ground, [2 ...

5. Timeline of motorized bicycle history - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_motorized...

   1952 – The 18cc German Lohmann is one of the few semi-diesel bike motors ever produced and is claimed to be the world's smallest bike motor. [16] 1966 – The Vélosolex 3800 is introduced and becomes the most popular version of the Vélosolex motorized bicycle, production continues until 1988. [17] 1968 – The Honda P50 the last vehicle to ...

6. VéloSoleX - Wikipedia

   en.wikipedia.org/wiki/VéloSoleX

   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

7. Two-stroke engine - Wikipedia

   en.wikipedia.org/wiki/Two-stroke_engine

   Animation of a two-stroke engine. A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes of the piston (one up and one down movement) in one revolution of the crankshaft in contrast to a four-stroke engine which requires four strokes of the piston in two crankshaft revolutions to complete a power cycle.