BMW R61

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BMW R61
Manufacturer
BMW
Also called R 61
Production 1938 - 1941
Class Classic
Engine
two cylinder boxer, four-stroke
Bore / Stroke 70.0mm x 78.0mm
Compression ratio 5.7:1
Top Speed 71 mph (115 km/h)
Horsepower 17.57 HP (13.1 KW) @ 4800RPM
Battery 5.7:1
Transmission Gear box: 4-speed

Final Drive: shaft drive (cardan)

Clutch: dry-single plate-cable operated
Suspension Front: leading link
Rear: twin shock-swingarm
Brakes Front: expanding brake (drum brake). single
Rear: expanding brake (drum brake)
Front Tire 3.50-19.00
Rear Tire 3.50-19.00
Wheelbase 55.12 inches (1400 mm)
Length 83.86 inches (2130 mm)
Width 32.09 inches (815 mm)
Height 37.8 inches (960 mm)
Weight 184.0 kg (wet)
Fuel Capacity 3.7 Gallon (14.00 Liters)
Fuel Consumption 3.50 liters/100 km (28.6 km/l or 67.21 mpg)
Manuals Service Manual


The BMW R61 was a two cylinder boxer, four-stroke Classic motorcycle produced by BMW between 1938 and 1941. It could reach a top speed of 71 mph (115 km/h). Claimed horsepower was 17.57 HP (13.1 KW) @ 4800 RPM.

Engine[edit]

The engine was a air cooled two cylinder boxer, four-stroke. A 70.0mm bore x 78.0mm stroke result in a displacement of just 600.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).

Drive[edit]

The bike has a 4-speed transmission. Power was moderated via the dry-single plate-cable operated.

Chassis[edit]

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). single in the front and a expanding brake (drum brake) in the rear. The front suspension was a leading link while the rear was equipped with a twin shock-swingarm. The R61 was fitted with a 3.7 Gallon (14.00 Liters) fuel tank. The wheelbase was 55.12 inches (1400 mm) long.

1938 - 1941 BMW R 61[edit]

1938 - 1941 BMW R 61 1938 - 1941 BMW R 61 1938 - 1941 BMW R 61 1938 - 1941 BMW R 61

The 1938 BMW R 61 has, at its heart, an air-cooled, four-stroke, 600cc, single vertical cylinder powerhouse paired to a four-speed manual transmission that can produce a claimed 18 horsepower at 4800 rpm. It also comes with a single, sprung seat, wide handlebars, a large headlamp, a rear luggage rack, laced wheels, a telescopic front fork, plunger shocks in the rear, a front drum brake coupled to an external shoe brake at the gearing on cardan shaft and a dry, single plate clutch.


In Media[edit]