Difference between revisions of "BSA M21"

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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-2746-1.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-2746-0.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]]
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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]]

Latest revision as of 20:11, 23 November 2019

1953[edit | edit source]

1953 BSA M21 in Maroon
1953 BSA M21 in Maroon
1953 BSA M21 in Maroon
1953 BSA M21 in Maroon


External Links[edit | edit source]

1953-BSA-M21-Maroon-2746-0.jpg
BSA M21
Manufacturer
BSA
Also called M 21
Production 1937 - 1956
Class Classic
Engine
single cylinder, four-stroke
Bore / Stroke 82.0mm x 112.0mm
Compression ratio 5.0:1
Horsepower 14.62 HP (10.9 KW) @ 4000RPM
Ignition magneto
Transmission Gear box: 4-speed, manual

Final Drive: chain

Clutch: wet multiplate
Suspension Front: hydraulic telescopic
Rear: twin shock
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 3.25-19
Rear Tire 3.25-19
Wheelbase 54.02 inches (1372 mm)
Length 85.79 inches (2179 mm)
Width 29.09 inches (739 mm)
Seat Height 28.5 inches (724 mm)
Weight 396.83 pounds (180.0 Kg) (dry), 167.0 kg (wet)
Fuel Capacity 3.0 Gallon (11.36 Liters)
Manuals Service Manual


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[edit | edit source]

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[edit | edit source]

The bike has a 4-speed, manual transmission. Power was moderated via the wet multiplate.

Chassis[edit | edit source]

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[edit | edit source]

1937 - 1961 BSA M21 1937 - 1961 BSA M21 1937 - 1961 BSA M21 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[edit | edit source]