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Also called R 66
Production 1938 - 1941
Class Classic
two cylinder boxer, four-stroke
Bore / Stroke 69.8mm x 78.0mm
Compression ratio 6.8:1
Top Speed 90 mph (145 km/h)
Horsepower 29.37 HP (21.9 KW) @ 5300RPM
Ignition forced feed
Transmission Gear box: 4-speed

Final Drive: shaft drive (cardan)

Clutch: dry-single plate-cable operated
Suspension Front: cartridge
Rear: twin shock-swingarm
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 3.5-19
Rear Tire 3.5-19
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 187.0 kg (wet)
Fuel Capacity 3.7 Gallon (14.00 Liters)
Manuals Service Manual

The BMW R66 was a two cylinder boxer, four-stroke Classic motorcycle produced by BMW between 1938 and 1941. It could reach a top speed of 90 mph (145 km/h). Claimed horsepower was 29.37 HP (21.9 KW) @ 5300 RPM.


The engine was a air cooled two cylinder boxer, four-stroke. A 69.8mm bore x 78.0mm stroke result in a displacement of just 596.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).


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


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 cartridge while the rear was equipped with a twin shock-swingarm. The R66 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 66[edit]

1938 - 1941 BMW R 66

The 1938 BMW R 66 has, at its heart, an air-cooled, four-stroke, 595cc, single vertical cylinder powerhouse mated to a four-speed manual transmission that can reach a maximum power output of 30 horsepower at 5300 rpm. It also comes with a telescopic front fork, plunger shocks as a rear suspension, a sprung single seat, a rear, fender-mounted luggage rack, a round headlamp, a dual exhaust system, laced wheels, full fenders and a blacked-out, steel frame.

In Media[edit]