Start of Production

1948

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End of Production

1950

Numbers Produced

12,020

Price

1,750 DM

Engine

 

Internal Designation

224/1

Motor Type

Four-stroke single cylinder vertical

Bore x Stroke

68 x 68 mm (2.67 x 2.67 in)

Displacement

247 cc

Max Power

12 hp at 5,600 rpm

Compression Ratio

6.75 : 1

Valves

OHV

Carburation System

1 x Bing type AJ 1/22/140 b

Engine Lubricating System

Forced feed lubrication

Oil Pump

Gear pump



Power Transmission

 

Clutch

Single plate, dry

Number of Gears

4

Shifting

Foot switching (+ auxiliary manual switch on gearing block)

Gearbox Ratios

6.1 / 3.0 / 2.04 / 1.54

Rear Wheel Ratio

1 : 4.18 or 1 : 4.25

Bevel/Crownwheel

11 / 46 or 8 / 34 teeth



Electrical System

 

Ignition System

Battery ignition

Generator

Bosch 6V/45W

Spark Plugs

Bosch W 240 T1 or Bosch W 225 T1






Chassis

 

Designation

224/1

Frame

Closed steel twin loop frame, bolted

Front wheel suspension

Telescopic fork

Rear wheel suspension

Rigid

Wheel rims

2.5 x 19 deep bed

Tyres, Front

3 x 19

Tyres, Rear

3 x 19

Brakes, Front

Drum brake 160 mm / 6.29 in diameter

Brakes, Rear

Drum brake 160 mm / 6.29 in diameter




Dimensions/Weights

 

Length x Width x Height

2020 x 750 x 710 mm (saddle) (79.52 x 29.52 x 27.95)

Fuel Tank Capacity

12 litres / 2.63 gal / 3.17 gal US

Unladen Weight with Full Tank

130 Kg / 286 lb

Load Rating

290 Kg / 638 lb

Fuel Consumption

Approx. 3.5 litres per 100 Km / 80 mpg / 67 mpg US

Oil Consumption

Approx. 1 litres per 1,000 Km

Top Speed

95 Kph / 59 mph

Information kindly supplied by P.Hawksley

www.bmbikes.co.uk