1938 BMW R61
 
          General motorcycle information
Engine and transmission
Displacement
        
                      36.61 cubic inches            (600.0 ccm)
                  
      Engine type
        
          Two cylinder boxer, 4 stroke        
      Power
      
                  17.9 horsepowers          (13.4 kiloWatts)
           at 4800 RPM              
    Torque
      
                  -
              
    Compression
      
                  5.7:1
              
    Bore x stroke
      
                  4.27 x 4.76 inches (70.0 x 78.0 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
      
                  3.50 litres/100 km, 28.6 km/l or 67.2 mpg              
    Top speed
      
                  115.0 kmh (71.5 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
        
          405.7 pounds (184.0 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
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    Insurance costs
        
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