Start of Production

1960

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End of Production

1969

Numbers Produced

19,036

Price

3,130 DM

Engine

 

Internal Designation

252/2

Motor Type

Four-stroke two cylinder flat twin

Bore x Stroke

68 x 68 mm (2.67 x 2.67 in)

Displacement

494 cc

Max Power

26 hp at 5,800 rpm

Compression Ratio

7.5 : 1

Valves

OHV

Carburation System

2 x carburettor, Bing 1/24/45 - 46 or 1/24/131 - 132 or 1/24/149 - 150

Engine Lubricating System

Forced feed lubrication

Oil Pump

Gear pump



Power Transmission

 

Clutch

Single plate saucer spring, dry

Number of Gears

4

Shifting

Foot shifting

Gearbox Ratios

4.17 / 2.73 / 1.94 / 1.54 (with sidecar: 5.33 / 3.02 / 2.04 / 1.54

Rear Wheel Ratio

1 : 3.18 (1 : 4.25 or 1 : 4.33 with sidecar)

Bevel/Crownwheel

11 / 35 teeth (8 / 34 or 6 / 26 with sidecar)



Electrical System

 

Ignition System

Magneto ignition

Generator

Bosch LJ/CGE 60/61700 R

Spark Plugs

Bosch W 240/14






Chassis

 

Designation

R245/1

Frame

Double loop steel tubular frame

Front wheel suspension

Long swing arm with suspension units and oil pressure shock absorbers

Rear wheel suspension

Long swing arm with suspension units and oil pressure shock absorbers

Wheel rims

Deep bed 3 x 18 (with sidecar, rear 2.75C x 18)

Tyres, Front

3.5 x 18

Tyres, Rear

3.5 x 18 (with sidecar, 4 x 18)

Brakes, Front

Drum brake 200 mm  / 7.87 indiameter duplex full hub

Brakes, Rear

Drum brake 200 mm / 7.87 in diameter simplex full hub




Dimensions/Weights

 

Length x Width x Height

2125 x 660 x 980 mm (83.66 x 25.9838.58 in)

Wheel Base

1415 mm  / 55.66 in (with original sidecar 1450 mm / 57.08 in)

Fuel Tank Capacity

17 litres / 3.73 gal / 4.49 gal US

Unladen Weight with Full Tank

195 Kg / 429 lb (320 Kg / 704 lb with original sidecar)

Idle/Riding Noise

82/76 phon (from June 1967: 72 dB (A), 84 dB (A))

Load Rating

360 Kg / 792 lb (with original sidecar, 600 Kg / 1321 lb)

Fuel Consumption

Approx. 5.1 litres per 100 Km / 55 mpg / 46 mpg US

Oil Consumption

Approx. 0.5 - 1 litre per 1,000 Km

Top Speed

140 Kph / 87 mph (with original sidecar, 100 Kph / 62 mph)

Information kindly supplied by P.Hawksley

www.bmbikes.co.uk