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The motorcycle is powered by a split-single two-stroke engine (two pistons sharing a single combustion chamber). It was marketed in the United States by Sears as the "Allstate 250" or "Twingle", with the model number SR 250, and sold primarily via the Sears catalog. [1] It was a common "first motorcycle" for many riders. [2]
In 1974, Rokon produced the RT340 TCR Automatic motorcycle, using a snowmobile-type Salsbury CVT, rear wheel drive only, and dual disc brakes. Another unusual feature was a pull cord to start the engine. The transmission freewheels with the engine at idle; starts to engage about 2800 RPM; and is tuned so the engine always runs near peak power ...
The 1910s has their share of expensive historic motorcycles sold at auction, especially the brands Cyclone and Flying Merkel. [2] A 1915 Cyclone Board Track Racer went for US$852,500 at an auction in 2015, one of the just 12 that survived; another of this model sold for $551,200 in 2008. [ 2 ]
Roadog is a motorcycle built by engineer and motorcycle enthusiast Wild Bill Gelbke between 1962 and 1965. A total of two were built. Gelbke, who had attended engineering school in Wisconsin and at University of Southern California, had worked for McDonnell Douglas and also owned two motorcycle shops in Chicago and Hammond, Indiana.
Clay Ridley began experimenting with automatic transmissions in motorcycles in 1995, when building them for his sons as a hobby. [2] Although the vast majority of cars and light trucks sold in the U.S. use automatic transmissions, no two-wheeled vehicles larger than a scooter did, and so to capitalize on that market, he and his son Jay founded the Ridley Motorcycle Company in 1997, which ...
Although Simplex Manufacturing Corporation produced motorcycles for over 20 years, the last Simplex Automatics looked almost the same as the company's original 1935 Simplex Servi-Cycle motorcycle. Paul Treen would often visit the factory's tool shop and work with the engineers on new ideas himself, resulting in continuous improvements to ...
List of motorcycles of the 1920s is a listing of motorcycles of the 1920s, including those on sale, introduced, or otherwise relevant in this period. Motor cycle [ edit ]
In 1964 Simson launched the SR 4-1 Spatz ("sparrow") and SR 4-2 Star, each of which had motorcycle-style bodywork without the legshields and rear enclosure. [37] The Spatz initially had the long-stroke 38 x 42mm engine and an 8.5:1 compression ratio and produced 2 bhp; [ 38 ] the Star had an "over-square" 40 x 39.5 mm engine with 9.5:1 ...