Start of Production

1935

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End of Production

1942

Number Produced:

36,000 (single and twin carb versions)

Price:

1,630 RM

Engine

 

Internal Designation

M 56 S 6 or 212

Motor Type

Four Stroke two cylinder flat twin

Bore x Stroke

78 x 78 mm (3.07 x 3.07 in)

Displacement

745 cc

Maximum Power

18hp at 3,400 rpm

Compression Ratio

5.2 : 1

Valves

SV

Carburation System

1 x SUM type CK 25 mm

Engine Lubricating System

Forced Feed Lubrication

Oil Pump

Gear Pump



Power Transmission

 

Clutch

Double plate dry clutch

Number of Gears

Four

Gear Shift

Manual

Gearbox Ratios

3.18 / 2.06 / 1.42 / 1.09

Rear Wheel Ratio

1 : 4.07 (1 : 4.75 with sidecar)

Bevel / Crownwheel

14 / 57 teeth (12 / 57 with sidecar)



Electrical System

 

Ignition System

Magneto or battery ignition

Generator

Bosch D 2 BRS 170

Spark Plugs

Bosch M 175/T1 or Bosch W 175 T1






Chassis

 

Designation

F 66

Frame

Pressed steel twin loop frame

Front Suspension

Telescopic fork

Rear Suspension

Rigid

Wheel Rims

3 x 19

Front Tyre

3.5 x 19

Rear Tyre

3.5 x 19

Front Brakes

Drum brake 200 mm / 7.87 in diameter

Rear Brake

Drum brake 200 mm / 7.87 in diameter




Dimensions/Weights

 

Length x Width x Height

2100 x 900 x 940 mm (82.67 x 35.43 x 37.00 in)

Wheel Base

1380 mm / 54.33 in

Fuel Tank Capacity

14 litres / 3.07 gal / 3.69 gal US

Unladen Weight with full tank

185 kg approx / 407 lb

Load Rating

300 kg / 660 lb

Fuel Consumption

3.5 - 4 litres per 100 kilometres approx / 80 - 70 mpg / 67 - 58 mpg US

Oil Consumption

1 - 2 litres per 1,000 kilometres

Top Speed

110  kph / 68 mph



Information kindly supplied by P.Hawksley

www.bmbikes.co.uk