Difference between revisions of "BMW R42"
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{{Motorcycle | |||
|name = BMW R42 | |||
|photo=bmw-r-42-1926-1928-1.jpg | |||
|aka = | |||
|manufacturer = BMW | |||
|parent_company = | |||
|production = 1926 - 1928 | |||
|model_year = | |||
|predecessor = | |||
|successor = | |||
|class = Classic | |||
|engine = air-cooled, four-stroke, boxer twin cylinder, SV | |||
|bore_stroke = 68.6mm x 68.6mm | |||
|compression = 4.9:1 | |||
|top_speed = 59 mph (95 km/h) | |||
|power = 11.67 HP (8.7 KW) @ 3400RPM | |||
|torque = | |||
|fuel_system = carburetor. 20mm BMW spezial | |||
|ignition = | |||
|spark_plug = | |||
|battery = | |||
|transmission = Gear box: 3 speed, manual <br> | |||
Final Drive: [[shaft]] <br> | |||
Clutch: dry, single plate <br> | |||
[[ | |frame = | ||
[[Category: | |suspension =Front: plate spring, 5 laminae <br> | ||
Rear: hard-tail, sprung seat | |||
|brakes =Front: 150mm drum <br>Rear: external shoe [[brake]] at gearing (on cardan shaft) | |||
|front_tire = {{tire|27 x 3.5}} | |||
|rear_tire = {{tire|27 x 3.5}} | |||
|rake_trail = | |||
|wheelbase = 55.51 inches (1410 mm) | |||
|length = 82.68 inches (2100 mm) | |||
|width = 31.5 inches (800 mm) | |||
|height = 37.4 inches (950 mm) | |||
|seat_height = | |||
|dry_weight = | |||
|wet_weight = 126.0 kg | |||
|fuel_capacity = | |||
|oil_capacity = | |||
|fuel_consumption = | |||
|turning_radius = | |||
|related = | |||
|competition = | |||
}} | |||
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== | |||
<gallery mode='packed-hover'> | |||
File:bmw-r-42-1926-1928-1.jpg|600px|1926 - 1928 BMW R 42 | |||
File:bmw-r-42-1926-1928-0.jpg|600px|1926 - 1928 BMW R 42 | |||
File:1926-BMW-R42.jpg|left|thumb|1926 BMW R42 | |||
</gallery> | |||
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. | |||
[[Category:Classic motorcycles]] | |||
[[Category:BMW motorcycles]] | |||
[[Category:1920s motorcycles]] |
Latest revision as of 13:39, 3 June 2020
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.
BMW R42 | |
Manufacturer | |
---|---|
Production | 1926 - 1928 |
Class | Classic |
Engine | air-cooled, four-stroke, boxer twin cylinder, SV |
Bore / Stroke | 68.6mm x 68.6mm |
Compression ratio | 4.9:1 |
Top Speed | 59 mph (95 km/h) |
Horsepower | 11.67 HP (8.7 KW) @ 3400RPM |
Fuel System | carburetor. 20mm BMW spezial |
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) |
Height | 37.4 inches (950 mm) |
Weight | 126.0 kg (wet) |
Manuals | Service Manual |
EngineEdit
A 68.6mm bore x 68.6mm stroke result in a displacement of just 494.0 cubic centimeters.
DriveEdit
The bike has a 3 speed, manual transmission. Power was moderated via the dry, single plate.
ChassisEdit
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 42Edit
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.