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BMW Motorcycles

New Model Info

Pre-Owned

Community

Production

Begin of the Production		1928

End of the Production		1930

Numbers Produced		1005

Price		1.850,- RM


Engine

Internal Designation		M 56

Motor Type		four-stroke two-cylinder flat-twin

Bore x Stroke		68 x 68 mm

Displacement		494 ccm

Max Power		18 hp at 4000 rpm

Compression Ratio		5.8 : 1

Valves		ohv

Carburetion System		1 x carburettor, BMW Spezial two-valve 24 mm

Engine Lubricating System		forced-feed lubrication

Oil Pump		gear pump


Power transmission

Clutch		single-plate, dry - from engine no. 70889: two plates

Number of Gears		3

Shifting		manual

Gearbox Ratios		2.83 / 1.55 / 1.08

Rear Wheel Ratio		1 : 4.38 (with sidecar 1 : 5.7)

Bevel / Crownwheel		13 / 57 teeth (sidecar 10 / 57)


Electrical system

Ignition System		Bosch high-voltage magneto ignition

Generator		Bosch magneto generator on request

Spark Plugs		Bosch W 175

Chassis

Designation		F 56

Frame		twin-loop steel tubular frame

Front Wheel Suspension		plate spring, 6 laminae

Rear Wheel Suspension		rigid

Wheel Rims		deep-bed 19 x 3 or 21 x 2.5

Tyres front		26 x 3.5 on 19 x 3 or 27 x 2.75 on 21 x 2.5

Tyres rear		26 x 3.5 on 19 x 3 or 27 x 2.75 on 21 x 2.5

Brakes front		drum brake Ø 200 mm

Brakes rear		external shoe brake at gearing (on cardan shaft)


Dimensions / Weights

Length x Width x Height		2100 x 800 x 950 mm

Wheel Base		1400 mm

Fuel Tank Capacity		12,5 l

Unladen Weight, Full Tank		150 kg

Load Rating		210 kg

Fuel Consumption		approx. 3,5 l/100 km

Oil Consumption		approx. 1-2 l/1000 km

Top Speed		115 kph