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[[Category:Classic motorcycles]] | [[Category:Classic motorcycles]] | ||
[[Category:BMW motorcycles]] | [[Category:BMW motorcycles]] | ||
[[Category:1950s motorcycles]] | |||
[[Category:Motorcycles needing images]] | |||
{{Infobox Motorcycle | |||
|name = '''BMW R51''' | |||
|image = | |||
|aka = R51 2, R51 3, R 51 | |||
|manufacturer = [[BMW]] | |||
|parent_company = | |||
|production = 1938 - 1954 | |||
|model_year = | |||
|predecessor = | |||
|successor = | |||
|class = [[Classic]] | |||
|engine = two cylinder boxer, four-stroke | |||
|bore_stroke = 68.0mm x 68.0mm | |||
|compression = 6.7:1 | |||
|top_speed = 84 mph (135 km/h) | |||
|power = 23.6 HP (17.6 KW) @ 5800RPM | |||
|torque = | |||
|ignition = battery | |||
|spark_plug = | |||
|battery = 6.3:1 | |||
|transmission = Gear box: 4-speed <br> | |||
Final Drive: [[shaft]] drive (cardan) <br> | |||
Clutch: dry-single plate-cable operated <br> | |||
|frame = | |||
|suspension =Front: cartridge <br> | |||
Rear: telscopic | |||
|brakes =Front: expanding [[brake]] (drum brake) <br>Rear: expanding brake (drum brake) | |||
|front_tire = {{tire|3.50-19.00}} | |||
|rear_tire = {{tire|3.50-19.00}} | |||
|rake_trail = | |||
|wheelbase = 55.12 inches (1400 mm) | |||
|length = 83.86 inches (2130 mm) | |||
|width = 31.1 inches (790 mm) | |||
|height = 38.78 inches (985 mm) | |||
|seat_height = | |||
|dry_weight = | |||
|wet_weight = 190.0 kg | |||
|fuel_capacity = 4.49 Gallon (17.00 Liters) | |||
|oil_capacity = | |||
|fuel_consumption = 4.50 litres/100 km (22.2 km/l or 52.27 mpg) | |||
|turning_radius = | |||
|related = | |||
|competition = | |||
}} | |||
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. | |||
==Engine== | |||
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). | |||
==Drive== | |||
The bike has a 4-speed transmission. Power was moderated via the dry-single plate-cable operated. | |||
==Chassis== | |||
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. | |||
==1938 - 1940 BMW R 51== | |||
[[File:bmw-r51-1938-1940-0.jpg|600px|1938 - 1940 BMW R 51]] | |||
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. | |||
==In Media== | |||
* [https://motopixel.org/pixel/the-history-of-bmw-the-definitive-story#bmw-r51 The History of BMW: The Definitive Story] | |||
* [https://motopixel.org/pixel/les-malheurs-dalfred#bmw-r51 Les malheurs d'Alfred] | |||
* [https://motopixel.org/pixel/days-of-glory#bmw-r51 Days of Glory] | |||
* [https://motopixel.org/pixel/the-young-lions#bmw-r51 The Young Lions] | |||
* [https://motopixel.org/pixel/le-faux-pas#bmw-r51 Le faux pas] | |||
* [https://motopixel.org/pixel/the-scarlet-and-the-black#bmw-r51 The Scarlet and the Black] | |||
* [https://motopixel.org/pixel/zone-troopers#bmw-r51 Zone Troopers] | |||
* [https://motopixel.org/pixel/rappresaglia#bmw-r51 Rappresaglia] | |||
* [https://motopixel.org/pixel/polvere-di-stelle#bmw-r51 Polvere di stelle] | |||
* [https://motopixel.org/pixel/il-generale-della-rovere#bmw-r51 Il generale della Rovere] | |||
* [https://motopixel.org/pixel/le-quattro-giornate-di-napoli#bmw-r51 Le quattro giornate di Napoli] | |||
* [https://motopixel.org/pixel/zycie-na-goraco#bmw-r51 Zycie na goraco] | |||
* [https://motopixel.org/pixel/a-couteaux-tires#bmw-r51 A couteaux tirés] | |||
[[Category:Classic motorcycles]] | |||
[[Category:BMW motorcycles]] | |||
[[Category:1930s motorcycles]] | |||
[[Category:1940s motorcycles]] | |||
[[Category:1950s motorcycles]] | [[Category:1950s motorcycles]] | ||
[[Category:Motorcycles needing images]] | [[Category:Motorcycles needing images]] |