BMW R 25/3

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'BMW R 25/3'
Production 1953
Class [[:Category:Classic motorcycles|Classic]] [[Category:Classic motorcycles]]
air-cooled, four-stroke, single cylinder, OHV, 2 valves per cylinder
Bore / Stroke 68.6mm x 68.6mm
Compression ratio 6.5:1
Horsepower 13.01 HP (9.7 KW) @ 5600RPM
Transmission Gear box: 4-speed, manual

Final Drive: shaft

Clutch: dry, single plate
Suspension Front: telescopic fork
Rear: pushrod, sprung seat
Brakes Front: single 160mm drum
Rear: single 160mm drum
Front Tire 3.25x19
Rear Tire 3.25x19
Length 81.61 inches (2073 mm)
Width 29.53 inches (750 mm)
Weight 140.0 kg (wet)
Manuals Service Manual

The BMW R 25/3 was a air-cooled, four-stroke, single cylinder, OHV, 2 valves per cylinder Classic motorcycle produced by BMW in 1953. Claimed horsepower was 13.01 HP (9.7 KW) @ 5600 RPM.


A 68.6mm bore x 68.6mm stroke result in a displacement of just 247.0 cubic centimeters.


The bike has a 4-speed, manual transmission. Power was moderated via the dry, single plate.


It came with a 3.25x19 front tire and a 3.25x19 rear tire. Stopping was achieved via single 160mm drum in the front and a single 160mm drum in the rear. The front suspension was a telescopic fork while the rear was equipped with a pushrod, sprung seat.

1953 - 1956 BMW R 25/3

1953 - 1956 BMW R 25/3 1953 - 1956 BMW R 25/3

The 1953 BMW R 25/3 boasts features such as laced wheels, a pushrod rear suspension with a sprung single seat, a telescopic front fork, a rear luggage rack, wide handlebars, a large headlamp, a small tail light, full fenders and a dry, single plate clutch. In the engine department, it sports an air-cooled, four-stroke, 247cc, single cylinder powerhouse mated to a four-speed manual transmission and can produce a claimed 13 horsepower at 5600 rpm.

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