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BMW Motorcycles

New Model Info

Pre-Owned

Community

Production

Begin of the Production		1950

End of the Production		1951

Numbers Produced		5000

Price		2.750,- DM


Engine

Internal Designation		254/3

Motor Type		four-stroke two-cylinder flat-twin

Bore x Stroke		68 x 68 mm

Displacement		494 ccm

Max Power		24 hp at 5800 rpm

Compression Ratio		6.4 : 1

Valves		ohv

Carburetion System		2 x carburettor type Bing 1/22/39 and 1/22/40

Engine Lubricating System		forced-feed lubrication

Oil Pump		gear pump


Power transmission

Clutch		single-plate, dry

Number of Gears		4

Shifting		foot shifting (+ auxiliary manual lever on the gear block)

Gearbox Ratios		3.6 / 2.28 / 1.7 / 1.3

Rear Wheel Ratio		3.89 : 1 (with sidecar 4.57 : 1)

Bevel / Crownwheel		9 / 35 (with sidecar 7 / 32)


Electrical system

Ignition System		battery ignition

Generator		Bosch 6 V/75 W

Spark Plugs		Bosch W 240 T1

Chassis

Designation		251/2

Frame		closed double steel tubular frame

Front Wheel Suspension		telescopic fork

Rear Wheel Suspension		telescopic suspension

Wheel Rims		deep-bed rims

Tyres front		3.5 x 19

Tyres rear		3.5 x 19

Brakes front		drum brakes Ø 200 mm (half hub)

Brakes rear		drum brakes Ø 200 mm (half hub)


Dimensions / Weights

Length x Width x Height		2130 x 815 x 720 mm (Saddle)

Fuel Tank Capacity		14 l

Unladen Weight, Full Tank		185 kg

Clearance		120 mm

Load Rating		400 kg

Fuel Consumption		approx. 4 l/100 km

Oil Consumption		approx. 1 l/1000 km

Top Speed		135 kph