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Also called R11 Series 1, R11 Series 2, R11 Series 3, R11 Series 5, R11 Series 4, R 11
Production 1929 - 1934
Class Classic
Successor BMW R12
two cylinder boxer, four-stroke
Bore / Stroke 78.0mm x 78.0mm
Compression ratio 5.5:1
Top Speed 68 mph (110 km/h)
Horsepower 17.57 HP (13.1 KW) @ 3400RPM
Ignition magneto
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)
Length 82.68 inches (2100 mm)
Width 35.04 inches (890 mm)
Height 37.01 inches (940 mm)
Weight 162.0 kg (wet)
Fuel Capacity 3.7 Gallon (14.00 Liters)
Fuel Consumption 4.50 liters/100 km (22.2 km/l or 52.27 mpg)
Related BMW R16
Manuals Service Manual

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.

History[edit | edit source]


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.

Engine[edit | edit source]

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.

Drive[edit | edit source]

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

Chassis[edit | edit source]

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 11[edit | edit source]

1929 - 1934 BMW R 11

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 Media[edit | edit source]