Difference between revisions of "BMW R 39"

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#Redirect [[BMW R39]]
 
{{Motorcycle
|name            = BMW R 39
|photo=bmw-r-39-1925-1927-0.jpg
|aka              =
|manufacturer    = BMW
|parent_company  =
|production      = 1925
|model_year      =
|predecessor      =
|successor        =
|class            = Classic
|engine          = air-cooled, four-stroke, single vertical cylinder, OHV
|bore_stroke      = 67.8mm x 67.8mm
|compression      = 6:1
|top_speed        =
|power            = 6.03 HP (4.5 KW) @ 4000RPM
|torque          =
|ignition        =
|spark_plug      =
|battery          =
|transmission    = Gear box: 3 speed, manual <br>
Final Drive: [[shaft]] <br>
Clutch: dry, single plate <br>
 
|frame            =
|suspension      =Front: plate spring, 4 laminae <br>
Rear: hard-tail, sprung seat
|brakes          =Front: 150mm drum <br>Rear: external shoe [[brake]] at the gearing (on cardan shaft)
|front_tire      = {{tire|27 x 3.5}}
|rear_tire    = {{tire|27 x 3.5}}
|rake_trail      =
|wheelbase        =
|length          = 80.0 inches (2032 mm)
|width            = 30.98 inches (787 mm)
|height          =
|seat_height      =
|dry_weight      =
|wet_weight      = 110.0 kg
|fuel_capacity    =
|oil_capacity    =
|fuel_consumption =
|turning_radius  =
|related          =
|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. 
 
==Engine==
A 67.8mm [[bore]] x 67.8mm [[stroke]] result in a [[displacement]] of just 247.0 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, 4 laminae while the rear was equipped with a hard-tail, sprung seat. 
 
==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:1920s motorcycles]]

Latest revision as of 13:34, 3 June 2020

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