Difference between revisions of "BMW R12"
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{{Infobox Motorcycle | {{Infobox Motorcycle | ||
|name = '''BMW R12''' | |name = '''BMW R12''' | ||
|image = | |image =[[Image:1939 BMW R12.jpg|frameless|1939 BMW R12]] | ||
|aka = R12 Single Carb, R12 Twin carb, R 12 | |aka = R12 Single Carb, R12 Twin carb, R 12 | ||
|manufacturer = [[BMW]] | |manufacturer = [[BMW]] | ||
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|production = 1935 - 1942 | |production = 1935 - 1942 | ||
|model_year = | |model_year = | ||
|predecessor = | |predecessor = [[BMW R11]] | ||
|successor = | |successor = | ||
|class = [[Classic]] | |class = [[Classic]] | ||
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|fuel_consumption = 3.40 litres/100 km (29.4 km/l or 69.18 mpg) | |fuel_consumption = 3.40 litres/100 km (29.4 km/l or 69.18 mpg) | ||
|turning_radius = | |turning_radius = | ||
|related = | |related = [[BMW R17]] | ||
|competition = | |competition = | ||
}} | }} | ||
The '''[[BMW]] R12 Single Carb''' was a two cylinder boxer, [[four-stroke]] Classic [[motorcycle]] produced by [[BMW]] between 1935 and 1942. It could reach a top speed of 68 mph (110 km/h). Claimed [[horsepower]] was 17.57 HP (13.1 KW) @ 3400 RPM. | The '''[[BMW]] R12 Single Carb''' was a two cylinder boxer, [[four-stroke]] Classic [[motorcycle]] produced by [[BMW]] between 1935 and 1942. It could reach a top speed of 68 mph (110 km/h). Claimed [[horsepower]] was 17.57 HP (13.1 KW) @ 3400 RPM. | ||
==History== | |||
[[Image:1938-BMW-R12-Army.jpg|right|thumb|1938 BMW R12 Army]] | |||
The '''R12''' was an air-cooled [[boxer twin]] [[four-stroke]] [[motorcycle]] produced by [[BMW]] from 1935-1942. | |||
The R12 along with its sister model, the [[BMW R17|R17]] were milestone models in the evolution of [[motorcycling]], being the first production machines to feature a hydraulically dampened [[telescopic front fork]]. This resulted in the R12 being the best selling pre-WWII [[:Category:BMW motorcycles|BMW motorcycle]], with 36,000 units sold from 1935 to 1942, with a great many going into [[:Category:Military motorcycles|military]] service. | |||
==Engine== | ==Engine== | ||
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* [https://motopixel.org/pixel/spojrzenie-na-wrzesien#bmw-r12 Spojrzenie na wrzesien] | * [https://motopixel.org/pixel/spojrzenie-na-wrzesien#bmw-r12 Spojrzenie na wrzesien] | ||
[[Category: | |||
[[Category:BMW | |||
{{BMW}} | |||
[[Category:BMW motorcycles|R12, BMW]] | |||
[[Category:Military motorcycles|R12]] | |||
[[Category:BMW R series]] | |||
[[Category:1930s motorcycles]] | [[Category:1930s motorcycles]] | ||
[[Category:1940s motorcycles]] | [[Category:1940s motorcycles]] | ||
[[Category: | [[Category:Classic motorcycles]] |
Revision as of 16:40, 12 June 2019
Manufacturer | BMW |
---|---|
Also called | R12 Single Carb, R12 Twin carb, R 12 |
Production | 1935 - 1942 |
Predecessor | BMW R11 |
Class | Classic |
Engine | two cylinder boxer, four-stroke |
Bore / Stroke | 78.0mm x 78.0mm |
Compression ratio | 5.2:1 |
Top speed | 68 mph (110 km/h) |
Horse Power | 17.57 HP (13.1 KW) @ 3400RPM |
Ignition type | magneto |
Battery | 5.2:1 |
Transmission | Gear box: 4-speed Final Drive: shaft |
Suspension | Front: telescopic fork Rear: rigid- |
Brakes | Front: expanding brake (drum brake) Rear: expanding brake (drum brake) |
Front Tire | 3.5-19 |
Rear Tire | 3.5-19 |
Wheelbase | 54.33 inches (1380 mm) |
Dimensions | L 82.68 inches (2100 mm) W 35.43 inches (900 mm) H 37.01 inches (940 mm) |
Weight | 407.86 pounds (185.0 Kg) (dry), 185.0 kg (wet) |
Fuel capacity | 3.7 Gallon (14.00 Liters) |
Fuel consumption | 3.40 litres/100 km (29.4 km/l or 69.18 mpg) |
Related | BMW R17 |
Manuals | Service Manual |
Tech Specs · Brochures · Reviews · Ads · Videos |
The BMW R12 Single Carb was a two cylinder boxer, four-stroke Classic motorcycle produced by BMW between 1935 and 1942. It could reach a top speed of 68 mph (110 km/h). Claimed horsepower was 17.57 HP (13.1 KW) @ 3400 RPM.
History
The R12 was an air-cooled boxer twin four-stroke motorcycle produced by BMW from 1935-1942.
The R12 along with its sister model, the R17 were milestone models in the evolution of motorcycling, being the first production machines to feature a hydraulically dampened telescopic front fork. This resulted in the R12 being the best selling pre-WWII BMW motorcycle, with 36,000 units sold from 1935 to 1942, with a great many going into military service.
Engine
The engine was a air cooled two cylinder boxer, four-stroke. A 78.0mm bore x 78.0mm stroke result in a displacement of just 745.0 cubic centimeters. Fuel was supplied via a standing valves.
Drive
The bike has a 4-speed transmission. Power was moderated via the dry multiplate-cable operated.
Chassis
It came with a 3.5-19 front tire and a 3.5-19 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 telescopic fork while the rear was equipped with a rigid-. The R12 Single Carb was fitted with a 3.7 Gallon (14.00 Liters) fuel tank. The bike weighed just 407.86 pounds (185.0 Kg). The wheelbase was 54.33 inches (1380 mm) long.
1935 - 1942 BMW R 12
The 1935 BMW R 12 has, at its heart, an air-cooled, four-stroke, 745cc, twin cylinder powerplant mated to a four-speed manual transmission and can produce a claimed 20 horsepower at 4000 rpm. It also comes with laced wheels, a large, round headlamp, a rear luggage rack, a telescopic front fork, a hard-tail rear suspension with a sprung single saddle, a drum braking system in the front and in the rear, a dual exhaust and a dry, double plate clutch.
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