Start of Production

1933

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End of Production

1933

Number Produced:

Approx 2,000

Price:

920 RM

Engine


Internal Designation

M 67 S II 33

Motor Type

Four Stroke single cylinder vertical

Bore x Stroke

63 x 64 mm (2.48 x 2.51 in)

Displacement

198 cc

Maximum Power

6hp at 3,500 rpm

Compression Ratio

6.7 : 1

Valves

OHV

Carburation System

1 x Sum type K 5/250. Approx. 80 units fitted with Amal carburettor

Engine Lubricating System

Forced Feed Lubrication

Oil Pump

Gear Pump



Power Transmission

 

Clutch

Single plate, dry

Number of Gears

3

Gear Shift

Manual

Gearbox Ratios

2.89 / 1.7 / 1.00

Rear Wheel Ratio

1 : 6.75

Bevel / Crownwheel

8 / 54 teeth



Electrical System

 

Ignition System

Battery ignition

Generator

Bosch 6V/30W

Spark Plugs

Bosch W 175 or Bosch 200 G 24






Chassis

 

Designation

F 67 S II 33

Frame

Pressed steel duplex frame

Front Suspension

Cantilever spring, 9 laminae. From 1/6/1933 with shock absorber

Rear Suspension

Rigid

Wheel Rims

25 x 3

Front Tyre

25 x 3

Rear Tyre

25 x 3

Front Brakes

Drum brake 180 mm / 7.08 in diameter

Rear Brake

Drum brake 180 mm / 7.08 in diameter




Dimensions/Weights

 

Length x Width x Height

1950 x 850 x 950 mm (76.77 x 33.46 x 37.40 in)

Wheel Base

1320 mm / 51.96 in

Fuel Tank Capacity

11 litres / 2.41 gal / 2.90 gal US

Unladen Weight with full tank

130 kg / 286 lb

Permitted Weight Limit

200 Kg / 440 lb

Fuel Consumption

2.75 litres per 100 kilometres approx / 102 mpg / 85 mpg US

Oil Consumption

1 - 2 litres per 1,000 kilometres

Top Speed

95  kph / 59 mph


Information kindly supplied by P.Hawksley

www.bmbikes.co.uk