1939 BMW R12 Single Carb motorcycle (1935-1942)
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- เผยแพร่เมื่อ 21 ต.ค. 2024
- Video about motorcycle 1939 BMW R12
Length - 2100 mm (82.7 inches)
Width - 900 mm (35.4 inches)
Height - 940 mm (37.0 inches)
Wheelbase - 1380 mm (54.3 inches)
Kerb weight -
Fuel capacity: 14.00 litres (3.70 US gallons)
Engine:
Engine size: 745.0 ccm (45.46 cubic inches)
Type of engine: Two cylinder boxer, four-stroke
Power: 18.0 HP (13.1 kW)) @ 3400 RPM
Top speed: 110.0 km/h (68.4 mph)
Fuel system: Carburettor, CK 25mm
Fuel control: Standing valves
Ignition: Magneto
Lubrication system: Forced feed
Fuel consumption: 3.40 litres/100 km (29.4 km/l or 69.18 mpg)
Starter: Kick
Transmission
Gearbox: Hand-Shifted Four-Speed Transmission
Front suspension: Telescopic fork
Rear suspension: Rigid
Front tire: 3.5-19
Rear tire: 3.5-19
Front brakes: Expanding brake (drum brake)
Diameter: 200 mm (7.9 inches)
Rear brakes: Expanding brake (drum brake)
Diameter: 200 mm (7.9 inches)
On 14 February 1935, BMW presented the R12 together with the R17 on the German Automobile Exhibition in Berlin for the first time, being a direct successor to the BMW R11.
The engine, designated M 56 S 6 or 212, was a twin-cylinder boxer configuration - four stroke with a flathead design.
The BMW R12 with two carburetors used a battery and coil ignition, while R12s with a single carburetor used a magneto ignition, capable of working independently from the battery.
The BMW R12 had a four-speed manual gearbox, operated by a hand shift lever on the fuel tank's right side. Several detail variations were seen in production. In common with most BMW Motorcycles, final drive was via shaft, with the drive shaft on the right side of the motorcycle.
Front suspension used a telescopic fork, while the frame was rigid with an un-sprung rear end supporting the final drive and a sprung seat for the rider. The R12 used drum brakes front and rear. Many R12's were equipped with a sidecar attached to the motorcycle's right side.
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