BMW R 47
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| BMW R 47 | |
| Manufacturer | |
|---|---|
| Production | 1928 |
| Class | Classic |
| Engine | air-cooled, four-stroke, boxer twin cylinder, OHV |
| Bore / Stroke | 68.6mm x 68.6mm |
| Compression ratio | 5.8:1 |
| Horsepower | 17.97 HP (13.4 KW) @ 4000RPM |
| Transmission | Gear box: 3 speed, manual Final Drive: shaft |
| Suspension | Front: plate spring, 5 laminae Rear: hard-tail, sprung seat |
| Brakes | Front: 150mm drum Rear: external shoe brake at the gearing (on cardan shaft) |
| Front Tire | 27 x 3.5 |
| Rear Tire | 27 x 3.5 |
| Wheelbase | 55.51 inches (1410 mm) |
| Length | 82.68 inches (2100 mm) |
| Width | 30.98 inches (787 mm) |
| Weight | 130.0 kg (wet) |
| Manuals | Service Manual |
The BMW R 47 was a air-cooled, four-stroke, boxer twin cylinder, OHV Classic motorcycle produced by BMW in 1928. Claimed horsepower was 17.97 HP (13.4 KW) @ 4000 RPM.
Engine
A 68.6mm bore x 68.6mm stroke result in a displacement of just 494.0 cubic centimeters.
Drive
The bike has a 3 speed, manual transmission. Power was moderated via the dry, single plate.
Chassis
It came with a 27 x 3.5 front tire and a 27 x 3.5 rear tire. Stopping was achieved via 150mm drum in the front and a external shoe brake at the gearing (on cardan shaft) in the rear. The front suspension was a plate spring, 5 laminae while the rear was equipped with a hard-tail, sprung seat. The wheelbase was 55.51 inches (1410 mm) long.
1928 BMW R 47
The House of Munich has launched the 1927 R 47 with an air-cooled, four-stroke, 494cc, boxer twin cylinder powerplant mated to a three-speed manual transmission, that could produce a claimed 18 horsepower at 4000 rpm. It comes with a front drum brake, a plate spring fork, a hard-tail rear suspension, a single sprung seat, a rear luggage rack, pull-back handlebars, laced wheels, long fenders, and a small luggage rack in the front.