Difference between revisions of "BMW R12"

From CycleChaos
Jump to navigation Jump to search
(expanding)
Line 1: Line 1:
[[Image:1938-BMW-R12-Army.jpg|left|thumb|1938 BMW R12 Army]]
[[Image:1939 BMW R12.jpg|right|thumb|1939 BMW R12]]
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. 
{{BMW}}
[[Category:BMW motorcycles|R12, BMW]]
[[Category:Military motorcycles|R12]]
[[Category:BMW R series]]
[[Category:1930s motorcycles]]
[[Category:1940s motorcycles]]
{{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]]
Line 21: Line 7:
|production      = 1935 - 1942
|production      = 1935 - 1942
|model_year      =
|model_year      =
|predecessor      =
|predecessor      = [[BMW R11]]
|successor        =
|successor        =
|class            = [[Classic]]
|class            = [[Classic]]
Line 55: Line 41:
|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==
Line 142: Line 136:
* [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:Classic motorcycles]]
 
[[Category:BMW motorcycles]]
 
{{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:Motorcycles needing images]]
[[Category:Classic motorcycles]]

Revision as of 16:40, 12 June 2019

BMW R12
1939 BMW R12
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

Clutch: dry multiplate-cable operated
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

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 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

1935 - 1942 BMW R 12 1935 - 1942 BMW R 12 1935 - 1942 BMW R 12 1935 - 1942 BMW R 12 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.


In Media