Difference between revisions of "BMW R39"
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{{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}} | {{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}} | ||
{{Motorcycle | {{Motorcycle | ||
|name = | |name = BMW R39 | ||
| | |photo=bmw-r-39-1925-1927-0.jpg | ||
|aka = | |aka = R39 | ||
|manufacturer = | |manufacturer = BMW | ||
|parent_company = | |parent_company = | ||
|production = | |production = 1925 - 1927 | ||
|model_year = | |model_year = | ||
|predecessor = | |predecessor = | ||
|successor = | |successor = | ||
|class = | |class = Classic | ||
|engine = | |engine = air-cooled, four-stroke, single vertical cylinder, OHV | ||
|bore_stroke = | |bore_stroke = 67.8mm x 67.8mm | ||
|compression = | |compression = 6:1 | ||
|top_speed = 62 mph (100 km/h) | |top_speed = 62 mph (100 km/h) | ||
|power = 5.9 HP (4.4 KW) @ 4000RPM | |power = 5.9 HP (4.4 KW) @ 4000RPM | ||
|torque = | |torque = | ||
|ignition = | |ignition = | ||
|spark_plug = | |spark_plug = | ||
|battery = | |battery = | ||
|transmission = Gear box: 3 | |transmission = Gear box: 3 speed, manual <br> | ||
Final Drive: [[shaft | Final Drive: [[shaft]] <br> | ||
Clutch: dry | Clutch: dry, single plate <br> | ||
|frame = | |frame = | ||
|suspension =Front: | |suspension =Front: plate spring, 4 laminae <br> | ||
Rear: | Rear: hard-tail, sprung seat | ||
|brakes =Front: | |brakes =Front: 150mm drum <br>Rear: external shoe [[brake]] at the gearing (on cardan shaft) | ||
|front_tire = {{tire|3.5 | |front_tire = {{tire|27 x 3.5}} | ||
|rear_tire = {{tire|3.5 | |rear_tire = {{tire|27 x 3.5}} | ||
|rake_trail = | |rake_trail = | ||
|wheelbase = | |wheelbase = | ||
|length = 80. | |length = 80.0 inches (2032 mm) | ||
|width = | |width = 30.98 inches (787 mm) | ||
|height = | |height = | ||
|seat_height = | |seat_height = | ||
|dry_weight = | |dry_weight = | ||
| Line 48: | Line 45: | ||
|competition = | |competition = | ||
}} | }} | ||
The '''[[BMW]] R 39''' was a air-cooled, four-stroke, single vertical cylinder, OHV Classic [[motorcycle]] produced by [[BMW]] in 1925. Claimed [[horsepower]] was 6.03 HP (4.5 KW) @ 4000 RPM. | |||
The '''[[BMW]] | |||
==Engine== | ==Engine== | ||
A 67.8mm [[bore]] x 67.8mm [[stroke]] result in a [[displacement]] of just 247.0 cubic centimeters. | |||
==Drive== | ==Drive== | ||
The bike has a 3 | The bike has a 3 speed, manual transmission. Power was moderated via the dry, single plate. | ||
==Chassis== | ==Chassis== | ||
It came with a 3.5 | 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, 4 laminae while the rear was equipped with a hard-tail, sprung seat. | ||
[[Category: | |||
==1925 - 1927 BMW R 39== | |||
[[File:bmw-r-39-1925-1927-0.jpg|600px|1925 - 1927 BMW R 39]] | |||
The 1925 BMW R 39 sports an air-cooled, four-stroke, 247cc, single vertical cylinder engine paired to a three-speed manual transmission and can produce 6.5 horsepower at 4000 rpm. Furthermore, this machine came standard with laced wheels, whitewall tires, a plate string front fork, a rigid rear suspension with a single, sprung saddle, a rear luggage rack, a small headlight, a short exhaust and tipped the scale, fully-fueled at just 110 kg. | |||
[[Category:Classic motorcycles]] | |||
[[Category:BMW motorcycles]] | [[Category:BMW motorcycles]] | ||
[[Category:1920s motorcycles]] | [[Category:1920s motorcycles]] | ||
Latest revision as of 13:34, 3 June 2020
 |
|
| BMW R39 | |
| Manufacturer | |
|---|---|
| Also called | R39 |
| Production | 1925 - 1927 |
| Class | Classic |
| Engine | air-cooled, four-stroke, single vertical cylinder, OHV |
| Bore / Stroke | 67.8mm x 67.8mm |
| Compression ratio | 6:1 |
| Top Speed | 62 mph (100 km/h) |
| Horsepower | 5.9 HP (4.4 KW) @ 4000RPM |
| Transmission | Gear box: 3 speed, manual Final Drive: shaft |
| Suspension | Front: plate spring, 4 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 |
| Length | 80.0 inches (2032 mm) |
| Width | 30.98 inches (787 mm) |
| Weight | 110.0 kg (wet) |
| Manuals | Service Manual |
The BMW R 39 was a air-cooled, four-stroke, single vertical cylinder, OHV Classic motorcycle produced by BMW in 1925. Claimed horsepower was 6.03 HP (4.5 KW) @ 4000 RPM.
Engine[edit | edit source]
A 67.8mm bore x 67.8mm stroke result in a displacement of just 247.0 cubic centimeters.
Drive[edit | edit source]
The bike has a 3 speed, manual transmission. Power was moderated via the dry, single plate.
Chassis[edit | edit source]
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, 4 laminae while the rear was equipped with a hard-tail, sprung seat.
1925 - 1927 BMW R 39[edit | edit source]
The 1925 BMW R 39 sports an air-cooled, four-stroke, 247cc, single vertical cylinder engine paired to a three-speed manual transmission and can produce 6.5 horsepower at 4000 rpm. Furthermore, this machine came standard with laced wheels, whitewall tires, a plate string front fork, a rigid rear suspension with a single, sprung saddle, a rear luggage rack, a small headlight, a short exhaust and tipped the scale, fully-fueled at just 110 kg.