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[[File:1939 B.S.A. M20.jpg|right|thumb|1939 B.S.A. M20]]
[[Image:1939 B.S.A. M20.jpg|right|thumb|1939 B.S.A. M20]]
[[BSA]]'s 400cc model M20 was introduced in 1938.  With World War II imminent, the British government quickly ordered 8,000 M20's for military use.  Heavy and cumbersome with low ground clearance, it wasn't the ideal battlefield machine, but above all it was supremely reliable and easy to build.  Over 126,000 were built for the Allied forces and remained as the primary military [[motorcycle]] for 20 years.  Sometimes the handgrips were made out of canvas when rubber was in very short supply.
[[BSA]]'s 400cc model M20 was introduced in 1938.  With World War II imminent, the British government quickly ordered 8,000 M20's for military use.  Heavy and cumbersome with low ground clearance, it wasn't the ideal battlefield machine, but above all it was supremely reliable and easy to build.  Over 126,000 were built for the Allied forces and remained as the primary military [[motorcycle]] for 20 years.  Sometimes the handgrips were made out of canvas when rubber was in very short supply.


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[[Category:Military motorcycles]]
[[Category:Military motorcycles]]
{{Motorcycle
|name            = BSA M20
|photo=1939 B.S.A. M20.jpg
|aka              =
|manufacturer    = BSA
|parent_company  =
|production      = 1940
|model_year      =
|predecessor      =
|successor        =
|class            = Classic
|engine          = air-cooled, four-stroke, single cylinder, side valve
|bore_stroke      = 81.3mm x 81.3mm
|compression      = 4.9:1
|top_speed        =
|power            = 13.01 HP (9.7 KW) @ 4200RPM
|torque          =
|ignition        =
|spark_plug      =
|battery          =
|transmission    = Gear box: 4-speed, manual <br>
Final Drive: [[chain]] <br>
Clutch: dry, multi-plate <br>
|frame            =
|suspension      =Front: parallelogram fork <br>
Rear: hard-tail, sprung seat
|brakes          =Front: drum <br>Rear: drum
|front_tire      = {{tire|3.25 x 19}}
|rear_tire    = {{tire|3.50 x 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      =
|wet_weight      = 167.0 kg
|fuel_capacity    =
|oil_capacity    =
|fuel_consumption =
|turning_radius  =
|related          =
|competition      =
}}
The '''[[BSA]] M20''' was a air-cooled, four-stroke, single cylinder, side [[valve]] Classic [[motorcycle]] produced by [[BSA]] in 1940. Claimed [[horsepower]] was 13.01 HP (9.7 KW) @ 4200 RPM. 
==Engine==
A 81.3mm [[bore]] x 81.3mm [[stroke]] result in a [[displacement]] of just 496.0 cubic centimeters. 
==Drive==
The bike has a 4-speed, manual transmission. Power was moderated via the dry, multi-plate. 
==Chassis==
It came with a 3.25 x 19 front [[tire]] and a 3.50 x 19 rear tire. Stopping was achieved via drum in the front and a drum in the rear. The front suspension was a  parallelogram fork while the rear was equipped with a hard-tail, sprung seat. The wheelbase was 54.02 inches (1372 mm) long. 
==1940 - 1956 BSA M20==
[[File:bsa-m20-1940-1956-3.jpg|600px|1940 - 1956 BSA M20]]
[[File:bsa-m20-1940-1956-2.jpg|600px|1940 - 1956 BSA M20]]
[[File:bsa-m20-1940-1956-1.jpg|600px|1940 - 1956 BSA M20]]
[[File:bsa-m20-1940-1956-0.jpg|600px|1940 - 1956 BSA M20]]
The BSA M20 was one of the most successful models produced by the British brand, being used also by the British Army throughout World War II. It had, at its heart, an air-cooled, four-stroke, 496cc, single cylinder powerplant mated to a four-speed manual transmission and can produce a claimed 13 horsepower at 4200 rpm. Standard fittings for this machine included a single, sprung seat, a hard-tail rear suspension, a parallelogram front fork, a large headlight, a steel exhaust system, pull-back handlebars, laced wheels and analogue instrumentation dials.
==In Media==
* [https://motopixel.org/pixel/strangers#bsa-m20 Strangers]
* [https://motopixel.org/pixel/guns-at-batasi#bsa-m20 Guns at Batasi]
* [https://motopixel.org/pixel/soldaat-van-oranje#bsa-m20 Soldaat van Oranje]
* [https://motopixel.org/pixel/the-39-steps#bsa-m20 The 39 Steps]
* [https://motopixel.org/pixel/midland-journey#bsa-m20 Midland Journey]
* [https://motopixel.org/pixel/raiders-of-the-lost-ark#bsa-m20 Raiders of the Lost Ark]
* [https://motopixel.org/pixel/vive-la-france-2#bsa-m20 Vive la France]
* [https://motopixel.org/pixel/soft-beds-hard-battles#bsa-m20 Soft Beds, Hard Battles]
* [https://motopixel.org/pixel/the-doctor-blake-mysteries#bsa-m20 The Doctor Blake Mysteries]
* [https://motopixel.org/pixel/hope-and-glory#bsa-m20 Hope and Glory]
* [https://motopixel.org/pixel/la-cause-commune#bsa-m20 La Cause Commune]
* [https://motopixel.org/pixel/battle-of-britain#bsa-m20 Battle of Britain]
* [https://motopixel.org/pixel/ayyam-wa-layali#bsa-m20 Ayyam wa layali]
* [https://motopixel.org/pixel/i-see-a-dark-stranger#bsa-m20 I See a Dark Stranger]
* [https://motopixel.org/pixel/age-of-heroes#bsa-m20 Age of Heroes]
* [https://motopixel.org/pixel/il-vigile#bsa-m20 Il vigile]
* [https://motopixel.org/pixel/a-different-story#bsa-m20 A Different Story]
* [https://motopixel.org/pixel/toto-le-heros#bsa-m20 Toto le héros]
* [https://motopixel.org/pixel/aint-misbehavin#bsa-m20 Ain't Misbehavin']
* [https://motopixel.org/pixel/momma-dont-allow#bsa-m20 Momma Don't Allow]
* [https://motopixel.org/pixel/dads-army#bsa-m20 Dad's Army]
* [https://motopixel.org/pixel/in-arte-nino#bsa-m20 In Arte Nino]
* [https://motopixel.org/pixel/blues-lakayitz#bsa-m20 Blues LaKayitz]
* [https://motopixel.org/pixel/kuroi-ame#bsa-m20 Kuroi ame]
* [https://motopixel.org/pixel/apocalypse-la-2eme-guerre-mondiale#bsa-m20 Apocalypse - La 2ème guerre mondiale]
* [https://motopixel.org/pixel/the-hole-in-the-ground#bsa-m20 The Hole in the Ground]
* [https://motopixel.org/pixel/military-policeman#bsa-m20 Military Policeman]
* [https://motopixel.org/pixel/filmavisen#bsa-m20 Filmavisen]
* [https://motopixel.org/pixel/fast-forward#bsa-m20 Fast Forward]
* [https://motopixel.org/pixel/the-beast-of-war#bsa-m20 The Beast of War]
* [https://motopixel.org/pixel/les-petits-matins#bsa-m20 Les petits matins]
* [https://motopixel.org/pixel/dis-en-historie-om-kjrlighet#bsa-m20 Dis - en historie om kjærlighet]
* [https://motopixel.org/pixel/the-master#bsa-m20 The Master]
* [https://motopixel.org/pixel/digby-the-biggest-dog-in-the-world#bsa-m20 Digby, the Biggest Dog in the World]
* [https://motopixel.org/pixel/la-donna-del-fiume#bsa-m20 La donna del fiume]
* [https://motopixel.org/pixel/boon#bsa-m20 Boon]
* [https://motopixel.org/pixel/the-tank#bsa-m20 The Tank]
* [https://motopixel.org/pixel/roman-zair#bsa-m20 Roman Za'ir]
* [https://motopixel.org/pixel/bataillon-du-ciel#bsa-m20 Bataillon du ciel]
* [https://motopixel.org/pixel/der-adler-vom-velsatal#bsa-m20 Der Adler vom Velsatal]
* [https://motopixel.org/pixel/czterej-pancerni-i-pies#bsa-m20 Czterej pancerni i pies]
* [https://motopixel.org/pixel/tali-ihantala-1944#bsa-m20 Tali-Ihantala 1944]
* [https://motopixel.org/pixel/sportman-van-de-eeuw#bsa-m20 Sportman van de Eeuw]
* [https://motopixel.org/pixel/exodus#bsa-m20 Exodus]
* [https://motopixel.org/pixel/the-water-horse-legend-of-the-deep#bsa-m20 The Water Horse]
* [https://motopixel.org/pixel/secret-mission#bsa-m20 Secret Mission]
* [https://motopixel.org/pixel/the-english-patient#bsa-m20 The English Patient]
* [https://motopixel.org/pixel/red-dwarf#bsa-m20 Red Dwarf]
[[Category:Classic motorcycles]]
[[Category:BSA motorcycles]]
[[Category:1940s motorcycles]]

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