BMW R57

BMW R57

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Model year
1929
make icon
Make
BMW
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Engine Power
17.95 HP (13.2 kW) @ 4000 rpm
Speed icon
Top Speed
71.46 mph

Technical Specifications

Engine and transmission

  • Engine type:
    2 cylinders, 4-stroke, Boxer
  • Displacement:
    494 cc (30.18 cubic inches)
  • Bore × stroke:
    2.68 inch × 2.68 inch (square)
  • Cooling system:
    Air cooled
  • Power:
    17.95 HP (13.2 kW) @ 4000 rpm
  • Throttle:
    Cable operated
  • Valve train:
    OHV, variable
  • Valves per cylinder:
    2
  • Sparks per cylinder:
    1
  • Fuel supply system:
    Carburetor
  • Funnel diameter:
    0.94 inch
  • Compression:
    5.8:1
  • Engine mounting:
    Longitudinal
  • Lubrication system:
    Wet sump
  • Gear box:
    Manual 3-speed
  • Clutch:
    Dry, single plate, cable operated
  • Final drive:
    Shaft
  • Spark plug pipe type:
    Bosch, W 175
  • Starter:
    Kick-starter

Dimensions

  • Length:
    82.7 inch
  • Width:
    31.5 inch
  • Height:
    37.4 inch
  • Wheel base:
    55.1 inch
  • Curb weight:
    330.7 lbs

Chassis and suspension

  • Front
    Suspension:
    Leading link
    Brake:
    Single Drum, Ø7.87 inch
    Tire:
    3.5 × 26
  • Rear
    Tire:
    3.5 × 26
  • Frame type:
    steel, Double cradle frame

Other

  • ABS available:
    No
  • Power-to-weight ratio:
    0.09 KW/lbs (11.36 lbs/HP)
  • Top speed:
    71.46 mph
  • Fuel capacity:
    3.3 gals
  • Number of riders:
    1 person

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