1938 BMW R51

General motorcycle information

Model

BMW R51

Year

1938

Engine and transmission

Displacement

30.14 cubic inches (494.0 ccm)

Engine type

Two cylinder boxer, 4 stroke

Power

24.1 horsepowers (17.9 kiloWatts) at 5600 RPM

Torque

Compression

6.7:1

Bore x stroke

4.15 x 4.15 inches (68.0 x 68.0 mm)

Fuel system

Carburettor

Fuel control

Overhead Valves (OHV)

Cooling system

Air

Gearbox

4-speed

Transmission type, final drive

Shaft drive (cardan)

Starter

Kick

Fuel consumption

4.00 litres/100 km, 25.0 km/l or 58.8 mpg

Top speed

140.0 kmh (87.0 mph)

Chassis, suspension, brakes and wheels

Front tyre

3.50-19.00

Rear tyre

3.50-19.00

Front brake

Expanding brake (drum)

Front brakes diameter

12.20 inches (200.0 mm)

Rear brake

Expanding brake (drum)

Rear brakes diameter

12.20 inches (200.0 mm)

Physical measures and capacities

Dry weight

Wet weight

401.2 pounds (182.0 kg)

Seat height

Wheelbase

85.4 inches (1400 mm)

Overall length

130.0 inches (2130 mm)

Overall width

49.7 inches (815 mm)

Overall height

58.6 inches (960 mm)

Ground clearance

Fuel capacity

3.70 gallons (14.0 litres)

Oil capacity

Further motorcycle information

More specs

All technical data from Bikez.com.

Rating

Detailed 1938 BMW R51 rating

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