BMW R 51/2

From CycleChaos
Jump to navigation Jump to search


BMW R 51/2
Manufacturer BMW
Production 1951
Class Classic
Engine air-cooled, four-stroke, boxer twin cylinder, 2 valves per cylinder
Bore / Stroke 68.6mm x 68.6mm
Compression ratio 6.4:1
Horse Power 24.0 HP (17.9 KW) @ 5800RPM
Transmission Gear box: 4-speed, manual

Final Drive: shaft

Clutch: dry, single plate
Suspension Front: telescopic fork
Rear: coil compression springs and rubber deflection stops
Brakes Front: 200mm drum
Rear: 200mm drum
Front Tire 3.5x19
Rear Tire 3.5x19
Wheelbase 55.0 inches (1397 mm)
Dimensions L 83.86 inches (2130 mm)
W 32.01 inches (813 mm)
Weight  (dry), 185.0 kg (wet)
Manuals Service Manual
Tech Specs · Brochures · Reviews · Ads · Videos

The BMW R 51/2 was a air-cooled, four-stroke, boxer twin cylinder, 2 valves per cylinder Classic motorcycle produced by BMW in 1951. Claimed horsepower was 24.0 HP (17.9 KW) @ 5800 RPM.

Engine[edit]

A 68.6mm bore x 68.6mm stroke result in a displacement of just 494.0 cubic centimeters.

Drive[edit]

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

Chassis[edit]

It came with a 3.5x19 front tire and a 3.5x19 rear tire. Stopping was achieved via 200mm drum in the front and a 200mm drum in the rear. The front suspension was a telescopic fork while the rear was equipped with a coil compression springs and rubber deflection stops. The wheelbase was 55.0 inches (1397 mm) long.

1951 BMW R 51/2[edit]

1951 BMW R 51/2 1951 BMW R 51/2

The 1950 BMW R 51/2 is the first machine from the House of Munich to be equipped with a boxer engine, in the post-war era. It has, at its heart, an air-cooled, four-stroke, 494cc, twin cylinder powerhouse paired to a four-speed manual transmission, and can produce a claimed 24 horsepower at 5800 rpm.

Standard fittings include a telescopic front fork, a rear suspension composed of coil compression springs and rubber deflection stops a drum braking system, a single seat, a rear luggage rack, a dual exhaust, laced wheels and full fenders.


In Media[edit]