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==1953==
==1953==
[[Image:1953-BSA-M21-Maroon-2746-0.jpg|left|thumb|1953 BSA M21 in Maroon]]
[[Image:1953-BSA-M21-Maroon-2746-0.jpg|left|thumb|1953 BSA M21 in Maroon]][[Image:1953-BSA-M21-Maroon-2746-1.jpg|left|thumb|1953 BSA M21 in Maroon]][[Image:1953-BSA-M21-Maroon-2746-2.jpg|left|thumb|1953 BSA M21 in Maroon]][[Image:1953-BSA-M21-Maroon-2746-3.jpg|left|thumb|1953 BSA M21 in Maroon]]
[[Image:1953-BSA-M21-Maroon-2746-1.jpg|left|thumb|1953 BSA M21 in Maroon]]
[[Image:1953-BSA-M21-Maroon-2746-2.jpg|left|thumb|1953 BSA M21 in Maroon]]
[[Image:1953-BSA-M21-Maroon-2746-3.jpg|left|thumb|1953 BSA M21 in Maroon]]
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[[Category:1950s motorcycles|BSA M21]]
[[Category:1950s motorcycles|BSA M21]]
[[Category:BSA motorcycles|BSA M21]]
[[Category:BSA motorcycles|BSA M21]]
{{Motorcycle
|name            = BSA M21
|photo= 1953-BSA-M21-Maroon-2746-0.jpg
|aka              = M 21
|manufacturer    = BSA
|parent_company  =
|production      = 1937 - 1956
|model_year      =
|predecessor      =
|successor        =
|class            = Classic
|engine          = single cylinder, four-stroke
|bore_stroke      = 82.0mm x 112.0mm
|compression      = 5.0:1
|top_speed        =
|power            = 14.62 HP (10.9 KW) @ 4000RPM
|torque          =
|ignition        = magneto
|spark_plug      =
|battery          =
|transmission    = Gear box: 4-speed, manual <br>
Final Drive: [[chain]] <br>
Clutch: wet multiplate <br>
|frame            =
|suspension      =Front: [[hydraulic]] telescopic <br>
Rear: twin shock
|brakes          =Front: expanding [[brake]] (drum brake) <br>Rear: expanding brake (drum brake)
|front_tire      = {{tire|3.25-19}}
|rear_tire    = {{tire|3.25-19}}
|rake_trail      =
|wheelbase        = 54.02 inches (1372 mm)
|length          = 85.79 inches (2179 mm)
|width            = 29.09 inches (739 mm)
|height          =
|seat_height      = 28.5 inches (724 mm)
|dry_weight      = 396.83 pounds (180.0 Kg)
|wet_weight      = 167.0 kg
|fuel_capacity    = 3.0 Gallon (11.36 Liters)
|oil_capacity    =
|fuel_consumption =
|turning_radius  =
|related          =
|competition      =
}}
The '''[[BSA]] M21''' was a single cylinder, [[four-stroke]] Classic [[motorcycle]] produced by [[BSA]] between 1937 and 1956. Claimed [[horsepower]] was 14.62 HP (10.9 KW) @ 4000 RPM. 
==Engine==
A 82.0mm [[bore]] x 112.0mm [[stroke]] result in a [[displacement]] of just 591.0 cubic centimeters. Fuel was supplied via a sidevalves. 
==Drive==
The bike has a 4-speed, manual transmission. Power was moderated via the wet multiplate. 
==Chassis==
It came with a 3.25-19 front [[tire]] and a 3.25-19 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a  hydraulic telescopic while the rear was equipped with a twin shock. The M21 was fitted with a 3.0 Gallon (11.36 Liters) fuel tank. The bike weighed just 396.83 pounds (180.0 Kg). The wheelbase was 54.02 inches (1372 mm) long. 
==1937 - 1961 BSA M21==
[[File:bsa-m21-1937-1961-3.jpg|600px|1937 - 1961 BSA M21]]
[[File:bsa-m21-1937-1961-2.jpg|600px|1937 - 1961 BSA M21]]
[[File:bsa-m21-1937-1961-1.jpg|600px|1937 - 1961 BSA M21]]
[[File:bsa-m21-1937-1961-0.jpg|600px|1937 - 1961 BSA M21]]
The M21 from British manufacturer BSA sports an air-cooled, four-stroke, 591cc, single cylinder powerplant mated to a four-speed manual transmission that can reach a maximum power output of 15 horsepower at 4200 rpm. Standard fittings for this classic machine include laced wheels, drum brakes in the front and in the rear, a large headlight, a hard-tail rear suspension, a single spring girder fork in the front, a sprung single seat and a chromed exhaust system.
==In Media==
* [https://motopixel.org/pixel/britains-best-drives#bsa-m21 Britain's Best Drives]
* [https://motopixel.org/pixel/the-league-of-gentlemen#bsa-m21 The League of Gentlemen]
* [https://motopixel.org/pixel/look-at-life-horse-power-riders#bsa-m21 Look at Life: Horse-Power Riders]
* [https://motopixel.org/pixel/quadrophenia#bsa-m21 Quadrophenia]
* [https://motopixel.org/pixel/whisky-galore#bsa-m21 Whisky Galore]
* [https://motopixel.org/pixel/seance-on-a-wet-afternoon#bsa-m21 Seance on a Wet Afternoon]
* [https://motopixel.org/pixel/el-aprendiz-de-malo#bsa-m21 El aprendiz de malo]
* [https://motopixel.org/pixel/dads-army-2#bsa-m21 Dad's Army]
* [https://motopixel.org/pixel/on-the-buses#bsa-m21 On the Buses]
* [https://motopixel.org/pixel/the-countrywomen#bsa-m21 The Countrywomen]
* [https://motopixel.org/pixel/la-legge#bsa-m21 La legge]
[[Category:Classic motorcycles]]
[[Category:BSA motorcycles]]
[[Category:1930s motorcycles]]
[[Category:1940s motorcycles]]
[[Category:1950s motorcycles]]

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