Start of Production

1935

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End of Production

1935

Number Produced:

2,700

Price:

850 RM

Engine


Internal Designation

M 67 S IV

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

8 hp at 4,500 rpm

Compression Ratio

6.7 : 1

Valves

OHV

Carburation System

1 x Amal push in carburettor 18.2 mm

Engine Lubricating System

Forced Feed Lubrication

Oil Pump

Gear Pump



Power Transmission


Clutch

Single plate dry clutch

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 encased

Spark Plugs

Bosch W 175 or Bosch 200 G 24






Chassis


Designation

F 67 S IV

Frame

Pressed steel duplex frame

Front Suspension

Cantilever spring, 9 laminae with friction 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

1303 mm / 51.29 in

Fuel Tank Capacity

10 litres / 2.19 gal / 2.64 gal US

Unladen Weight with full tank

130 kg / 286 lb

Permitted Weight Limit

160 kg / 352 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