BMW R71 1937

Reference: 220.1

Condition: Refurbished

Chang Jiang 750 M1

1st Registration: 1964.

Matricula Historica. Documentation in rule.

Engine:746cc. ITV the day. Made in China.

In perfect state of functioning.

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BMW R71 1937
Chang Jiang 750 M1
1st Registration: 1964.
Matricula Historica. Documentation in rule.
Engine:746cc. ITV the day. Made in China.
In perfect state of functioning.
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History of BMW motorcycles

BMW history of the motorcycle 's began in 1921 when the company commenced manufacturing engines for other companies. Manufacture of motorcycles now operates under the BMW Motorrad brand. BMW (Bayerische Motoren Werke AG) introduced the first motorcycle with its name, the R32 , in 1923.

The history of the motorcycle

Pre-1921

BMW began in 1916 as a reorganization of Rapp Motorenwerke , an aircraft engine manufacturer that began production before the First World War . With the armistice, the Treaty of Versailles banned the German air force and the manufacture of aircraft in Germany, so the company turned to making air brakes, industrial engines, agricultural machinery, toolboxes and office furniture and then to motorcycles and cars.

Start of Production	1938	BMW R71 1937
Production	1941
Numbers Produced	3458
Price	1.595 RM
Engine
Designation internal		271/1
Engine type		Four-stroke twin-cylinder double-flat
Bore x stroke		78 x 78 mm (3,07 x 3,07 in)
Displacement		746 cc
Max Power		22 HP at 4,600 rpm
Compression ratio		5.5: 1
Valves		SV
Carburetion system		2 x type carburetor Graetzin G 24
Engine lubrication System		Lubrication forced feed
Oil pump		Gear pump

Power transmission
Clutch		Sole plate, dry
Number of speeds		4
Change		Foot switching (+ manual lever auxiliary), lever manual change on request
Ratios of the gearbox		3,6 / 2,28 / 1. 7 / 1.3
Relationship of the rear wheel		1: 3.6 (1: 3,89 with sidecar)
Bevel / Crownwheel		10/36 teeth (9/35 with sidecar)

Electrical system
Ignition system		Ignition of the battery
Generator		Bosch RD 50/6 2800 RS 17
Spark plugs		Bosch W 175 T1



Chassis
Designation		251/1
Framework		Frame tubular steel double-loop
Suspension of the front wheel		Telescopic fork
Rear wheel suspension		Suspension telescopic
Tires		3 x 19 deep bed
Tires, front		3.5 x 19
Tires, rear		3.5 x 19
Brakes, front		Drum brake 200 mm / 7,87 in diameter
Brakes, rear		Drum brake 200 mm / 7,87 in diameter


Dimensions / Weights
Length x Width x Height		2130 x 815 x 960 mm (83.85 x 32.08 x 37.79 in)
Wheel Base		1,400 mm / 55,11 in
Fuel tank capacity		14 litres / 3.07 gal / 3.69 gal US
Empty weight with full tank		187 Kg
Load capacity		210 kg / 462 lb (max. Overall weight with sidecar 500Kg / 1.101 lb)
The fuel consumption		Approx. 4.5 litres to the 100 km
The consumption of oil		Approx. 1 litre per 1000 km
Speed Top		125 km / h (with sidecar original, 105 Kph)

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