Difference between revisions of "BMW R 42"
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{{Motorcycle | {{Motorcycle | ||
|name = | |name = BMW R 42 | ||
|photo=bmw-r-42-1926-1928-1.jpg | |photo=bmw-r-42-1926-1928-1.jpg | ||
|aka = | |aka = | ||
|manufacturer = | |manufacturer = BMW | ||
|parent_company = | |parent_company = | ||
|production = 1926 | |production = 1926 | ||
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|predecessor = | |predecessor = | ||
|successor = | |successor = | ||
|class = | |class = Classic | ||
|engine = air-cooled, four-stroke, boxer twin cylinder, SV | |engine = air-cooled, four-stroke, boxer twin cylinder, SV | ||
|bore_stroke = 68.6mm x 68.6mm | |bore_stroke = 68.6mm x 68.6mm | ||
Revision as of 20:28, 23 November 2019
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| BMW R 42 | |
| Manufacturer | |
|---|---|
| Production | 1926 |
| Class | Classic |
| Engine | air-cooled, four-stroke, boxer twin cylinder, SV |
| Bore / Stroke | 68.6mm x 68.6mm |
| Compression ratio | 4.9:1 |
| Horsepower | 11.94 HP (8.9 KW) @ 3400RPM |
| 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 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 | 31.5 inches (800 mm) |
| Weight | 126.0 kg (wet) |
| Manuals | Service Manual |
The BMW R 42 was a air-cooled, four-stroke, boxer twin cylinder, SV Classic motorcycle produced by BMW in 1926. Claimed horsepower was 11.94 HP (8.9 KW) @ 3400 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 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.
1926 - 1928 BMW R 42
The R 42 from the House of Munich had, at its heart, an air-cooled, four-stroke, 494cc, boxer twin cylinder engine mated to a three-speed manual transmission, and could reach a claimed maximum power output of 12 horsepower at 3400 rpm. Standard features included laced wheels, long fenders, a small headlamp, wide handlebars, a plate string front fork, a rigid rear suspension with a sprung seat, a rear luggage rack that could be transformed in a passenger seat, and a front drum brake.