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BMW R11

The BMW R11 Series 4 was a two cylinder boxer, four-stroke Classic motorcycle produced by BMW between 1929 and 1934. It could reach a top speed of 68 mph (110 km/h). Claimed horsepower was 17.57 HP (13.1 KW) @ 3400 RPM.

BMW R11
1929 BMW R11
Manufacturer BMW
Also called R11 Series 1, R11 Series 2, R11 Series 3, R11 Series 5, R11 Series 4, R 11
Production 1929 - 1934
Successor BMW R12
Class Classic
Engine two cylinder boxer, four-stroke
Bore / Stroke 78.0mm x 78.0mm
Compression ratio 5.5:1
Top speed 68 mph (110 km/h)
Horse Power 17.57 HP (13.1 KW) @ 3400RPM
Ignition type magneto
Battery 5.5:1
Transmission Gear box: 3-speed

Final Drive: shaft drive (cardan)

Clutch: two plates-dry
Suspension Front: plate springe
Rear: rigid
Brakes Front: expanding brake (drum brake)
Rear: 37mm cardan brake
Front Tire 3.50-26.00
Rear Tire 3.50-26.00
Wheelbase 54.33 inches (1380 mm)
Dimensions L 82.68 inches (2100 mm)
W 35.04 inches (890 mm)
H 37.01 inches (940 mm)
Weight  (dry), 162.0 kg (wet)
Fuel capacity 3.7 Gallon (14.00 Liters)
Fuel consumption 4.50 litres/100 km (22.2 km/l or 52.27 mpg)
Related BMW R16
Manuals Service Manual
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Contents

HistoryEdit

 
BMW R11


Shortly after venturing into car manufacture for the first time by acquiring the Dixi works at Eisenach, BMW introduced a major innovation to its motorcycle range in 1929. The transversely mounted 'flat-twin' engine was already a BMW trademark but for the first time it was installed in a pressed-steel frame, the first model to incorporate this landmark of motorcycle design being the 740cc R11. BMW's relatively vibration-free engine was already a byword for smoothness and refinement, and this, coupled to a three-speed shaft-drive transmission, made the R11 sidevalve one of the finest touring motorcycles of its day. Progressively improved, the R11 was built in five series up to 1934. This R11 displays a total of only 4 kilometres on the odometer, which, presumably, is the distance covered since restoration.


EngineEdit

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 sidevalves.

DriveEdit

The bike has a 3-speed transmission. Power was moderated via the two plates-dry.

ChassisEdit

It came with a 3.50-26.00 front tire and a 3.50-26.00 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a 37mm cardan brake in the rear. The front suspension was a plate springe while the rear was equipped with a rigid. The R11 Series 4 was fitted with a 3.7 Gallon (14.00 Liters) fuel tank. The wheelbase was 54.33 inches (1380 mm) long.

1929 - 1934 BMW R 11Edit

 

The 1929 BMW R 11 sports an air-cooled, four-stroke, 745cc, twin cylinder powerplant paired to a three-speed manual transmission and can produce a claimed 20 horsepower at 4400 rpm. It comes with a plate spring front suspension, a rigid rear suspension with a sprung saddle, a dual exhaust system, a rear luggage rack, laced wheels, a round headlamp and a dry, single plate clutch.


In MediaEdit