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| [[Category:1950s motorcycles]] | | [[Category:1950s motorcycles]] |
| [[Category:Motorcycles needing images]] | | [[Category:Motorcycles needing images]] |
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| {{Infobox Motorcycle
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| |name = '''BMW R51'''
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| |image =
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| |aka = R51 2, R51 3, R 51
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| |manufacturer = [[BMW]]
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| |parent_company =
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| |production = 1938 - 1954
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| |model_year =
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| |predecessor =
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| |successor =
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| |class = [[Classic]]
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| |engine = two cylinder boxer, four-stroke
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| |bore_stroke = 68.0mm x 68.0mm
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| |compression = 6.7:1
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| |top_speed = 84 mph (135 km/h)
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| |power = 23.6 HP (17.6 KW) @ 5800RPM
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| |torque =
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| |ignition = battery
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| |spark_plug =
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| |battery = 6.3:1
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| |transmission = Gear box: 4-speed <br>
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| Final Drive: [[shaft]] drive (cardan) <br>
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| Clutch: dry-single plate-cable operated <br>
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|
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| |frame =
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| |suspension =Front: cartridge <br>
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| Rear: telscopic
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| |brakes =Front: expanding [[brake]] (drum brake) <br>Rear: expanding brake (drum brake)
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| |front_tire = {{tire|3.50-19.00}}
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| |rear_tire = {{tire|3.50-19.00}}
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| |rake_trail =
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| |wheelbase = 55.12 inches (1400 mm)
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| |length = 83.86 inches (2130 mm)
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| |width = 31.1 inches (790 mm)
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| |height = 38.78 inches (985 mm)
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| |seat_height =
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| |dry_weight =
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| |wet_weight = 190.0 kg
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| |fuel_capacity = 4.49 Gallon (17.00 Liters)
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| |oil_capacity =
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| |fuel_consumption = 4.50 litres/100 km (22.2 km/l or 52.27 mpg)
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| |turning_radius =
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| |related =
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| |competition =
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| }}
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| The '''[[BMW]] R51 3''' was a two cylinder boxer, [[four-stroke]] Classic [[motorcycle]] produced by [[BMW]] between 1938 and 1954. It could reach a top speed of 84 mph (135 km/h). Claimed [[horsepower]] was 23.6 HP (17.6 KW) @ 5800 RPM.
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| ==Engine==
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| The engine was a [[air cooled]] two cylinder boxer, four-stroke. A 68.0mm [[bore]] x 68.0mm [[stroke]] result in a [[displacement]] of just 494.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).
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| ==Drive==
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| The bike has a 4-speed transmission. Power was moderated via the dry-single plate-cable operated.
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| ==Chassis==
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| It came with a 3.50-19.00 front [[tire]] and a 3.50-19.00 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 cartridge while the rear was equipped with a telscopic. The R51 3 was fitted with a 4.49 Gallon (17.00 Liters) fuel tank. The wheelbase was 55.12 inches (1400 mm) long.
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| ==1938 - 1940 BMW R 51==
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| [[File:bmw-r51-1938-1940-0.jpg|600px|1938 - 1940 BMW R 51]]
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| The 1938 BMW R 51 has, at its heart, an air-cooled, four-stroke, 494cc, boxer twin cylinder engine mated to a four-speed manual transmission, and can reach a maximum power output of 24 horsepower at 5800 rpm. It also comes with a telescopic front fork, a rear suspension composed of a long swing arm with suspension units and oil pressure shock absorbers, a drum braking system, a single seat, a rear luggage rack, a large headlight, a dual exhaust system, laced wheels and full fenders.
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| ==In Media==
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| * [https://motopixel.org/pixel/the-history-of-bmw-the-definitive-story#bmw-r51 The History of BMW: The Definitive Story]
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| * [https://motopixel.org/pixel/les-malheurs-dalfred#bmw-r51 Les malheurs d'Alfred]
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| * [https://motopixel.org/pixel/days-of-glory#bmw-r51 Days of Glory]
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| * [https://motopixel.org/pixel/the-young-lions#bmw-r51 The Young Lions]
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| * [https://motopixel.org/pixel/le-faux-pas#bmw-r51 Le faux pas]
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| * [https://motopixel.org/pixel/the-scarlet-and-the-black#bmw-r51 The Scarlet and the Black]
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| * [https://motopixel.org/pixel/zone-troopers#bmw-r51 Zone Troopers]
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| * [https://motopixel.org/pixel/rappresaglia#bmw-r51 Rappresaglia]
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| * [https://motopixel.org/pixel/polvere-di-stelle#bmw-r51 Polvere di stelle]
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| * [https://motopixel.org/pixel/il-generale-della-rovere#bmw-r51 Il generale della Rovere]
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| * [https://motopixel.org/pixel/le-quattro-giornate-di-napoli#bmw-r51 Le quattro giornate di Napoli]
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| * [https://motopixel.org/pixel/zycie-na-goraco#bmw-r51 Zycie na goraco]
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| * [https://motopixel.org/pixel/a-couteaux-tires#bmw-r51 A couteaux tirés]
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| [[Category:Classic motorcycles]]
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| [[Category:BMW motorcycles]]
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| [[Category:1930s motorcycles]]
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| [[Category:1940s motorcycles]]
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| [[Category:1950s motorcycles]]
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| [[Category:Motorcycles needing images]]
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| [[Category:Multiple Infoboxes]]
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