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{{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}}
{{DISPLAYTITLE:{{PAGENAME}}: history, specs, pictures}}
<gallery mode="packed-hover">
Image:1936-BMW-R3.jpg|left|thumb|1936 BMW R3
Image:R3.jpg|left|thumb|350px|BMW R3
</gallery>
The Depression years of the early 1930s brought with them the need for a simpler - and cheaper - model to compete with the lightweight two-strokes mopping up the lucrative up-to-200cc market. [[BMW|BMW]] responded with its second single-cylinder design – the 198cc [[BMW R2|BMW R2]] – which appeared early in 1931 and sold well despite the difficult trading conditions, as did the 398cc R4, a favourite with the German Army. R3 (305cc) and [[BMW R35|R35]] (347cc) singles appeared later in the 1930s, all enjoying the benefits of shaft drive like their larger siblings. Of these, the R3 is by far the rarest, being produced for the 1936 season only, during which time only 740 were made. Factory records show that this R3 was delivered to Moto-Lusa in Lisbon, Portugal in May 1936. Unrestored, the machine was first registered in the Netherlands in 1986 and was purchased for the Neutkens Collection in 1992. Noteworthy features include a Veigel-D-R-P 'Waltzentacho', quick-release fuel filler cap and a Bosch headlamp with Hella rim. Offered with Netherlands registration papers.
{{BMW}}
[[Category:BMW motorcycles|R3, BMW]]
[[Category:BMW R series]]
[[Category:1930s motorcycles]]
{{Motorcycle
{{Motorcycle
|name            = BMW R 3
|name            = BMW R3
|photo=bmw-r-3-1937-1937-0.jpg
|aka              =  
|aka              =  
|manufacturer    = BMW
|manufacturer    = BMW
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|predecessor      =
|predecessor      =
|successor        =
|successor        =
|class            = Classic
|class            =
|engine          = air-cooled, four-stroke, single vertical cylinder
|engine          = single cylinder, four-stroke
|bore_stroke      = 68.0mm x 84.0mm
|bore_stroke      = 68.0mm x 84.0mm
|compression      = 6.0:1
|compression      =
|top_speed        = 62 mph (100 km/h)
|top_speed        = 62 mph (100 km/h)
|power            = 11.0 HP (8.2 KW) @ 4200RPM
|power            = 10.73 HP (8.0 KW) @ 4200RPM
|torque          =
|torque          =
|ignition        =
|fuel_system      = carburetor. 18mm
|ignition        = battery
|spark_plug      =
|spark_plug      =
|battery          =
|battery          =  
|transmission    = Gear box: 4-speed, manual <br>
|transmission    = Final Drive: [[shaft drive]] (cardan) <br>
Clutch: dry, single plate <br>
Clutch: dry-single plate-cable operated <br>
|final_drive      = [[shaft]]
 
|frame            =
|frame            =
|suspension      =Front: parallelogram fork <br>
|suspension      =Front: cartridge <br>
Rear: hard-tail, sprung seat
Rear: rigid
|brakes          =Front: 200mm drum <br>Rear: 200mm drum
|brakes          =Front: expanding [[brake]] (drum brake) <br>Rear: expanding brake (drum brake)
|front_tire      = {{tire|3.50 x 26}}  
|front_tire      = {{tire|3.50-26.00}}  
|rear_tire    = {{tire|3.50 x 26}}  
|rear_tire    = {{tire|3.50-26.00}}  
|rake_trail      =
|rake_trail      =
|wheelbase        = 51.97 inches (1320 mm)
|wheelbase        = 51.97 inches (1320 mm)
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|fuel_capacity    = 3.17 Gallon (12.00 Liters)
|fuel_capacity    = 3.17 Gallon (12.00 Liters)
|oil_capacity    =
|oil_capacity    =
|fuel_consumption =
|fuel_consumption = 3.00 liters/100 km (33.3 km/l or 78.41 mpg)
|turning_radius  =
|turning_radius  =
|related          =
|related          =
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}}
}}


The '''[[BMW]] R 3''' was a air-cooled, four-stroke, single vertical cylinder Classic [[motorcycle]] produced by [[BMW]] in 1937. Claimed [[horsepower]] was 11.0 HP (8.2 KW) @ 4200 RPM.   
The '''[[BMW]] R3''' was a single cylinder, [[four-stroke]] standard produced by [[BMW]] in 1936. It could reach a top speed of 62 mph (100 km/h). Claimed [[horsepower]] was 10.73 HP (8.0 KW) @ 4200 RPM.   
 
<gallery mode="packed-hover">
Image:1936-BMW-R3.jpg|left|thumb|1936 BMW R3
Image:R3.jpg|left|thumb|350px|BMW R3
</gallery>
The Depression years of the early 1930s brought with them the need for a simpler - and cheaper - model to compete with the lightweight two-strokes mopping up the lucrative up-to-200cc market. [[BMW|BMW]] responded with its second single-cylinder design – the 198cc [[BMW R2|BMW R2]] – which appeared early in 1931 and sold well despite the difficult trading conditions, as did the 398cc R4, a favourite with the German Army. R3 (305cc) and [[BMW R35|R35]] (347cc) singles appeared later in the 1930s, all enjoying the benefits of shaft drive like their larger siblings. Of these, the R3 is by far the rarest, being produced for the 1936 season only, during which time only 740 were made. Factory records show that this R3 was delivered to Moto-Lusa in Lisbon, Portugal in May 1936. Unrestored, the machine was first registered in the Netherlands in 1986 and was purchased for the Neutkens Collection in 1992. Noteworthy features include a Veigel-D-R-P 'Waltzentacho', quick-release fuel filler cap and a Bosch headlamp with Hella rim. Offered with Netherlands registration papers.
 


==Engine==
==Engine==
A 68.6mm [[bore]] x 68.6mm [[stroke]] result in a [[displacement]] of just 305.0 cubic centimeters.   
The engine was a [[air cooled]] single cylinder, four-stroke. A 68.0mm [[bore]] x 84.0mm [[stroke]] result in a [[displacement]] of just 305.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).   


==Drive==
==Drive==
The bike has a 4-speed, manual transmission. Power was moderated via the dry, single plate.   
Power was moderated via the dry-single plate-cable operated.   


==Chassis==
==Chassis==
It came with a 3.50 x 26 front [[tire]] and a 3.50 x 26 rear tire. Stopping was achieved via 200mm drum in the front and a 200mm drum in the rear. The front suspension was a  parallelogram fork while the rear was equipped with a hard-tail, sprung seat.
It came with a 3.50-26.00 front [[tire]] and a 3.50-26.00 rear tire. Stopping was achieved via expanding brake (drum brake) in the front and a expanding brake (drum brake) in the rear. The front suspension was a  cartridge while the rear was equipped with a rigid. The R3 was fitted with a 3.17 Gallon (12.00 Liters) fuel tank. The wheelbase was 51.97 inches (1320 mm) long.
 
[[Category:standard motorcycles]]
==1937 BMW R 3==
[[Category:BMW motorcycles]]
[[File:bmw-r-3-1937-1937-0.jpg|600px|1937 BMW R 3]]
 
The 1937 BMW R3 has, at its heart, an air-cooled, four-stroke, 305cc, single vertical cylinder powerplant paired to a four-speed manual transmission, that can produce a claimed 11 horsepower at 4200 rpm. Standard features include laced wheels, a rigid rear suspension with a sprung seat, a parallelogram front fork, a large headlight, a taillight, a drum braking system and large fenders.
 
 
==In Media==
* [https://motopixel.org/pixel/bodomin-legenda#bmw-r-3 Bodomin legenda]
 
 
{{BMW}}
 
[[Category:BMW motorcycles|R3, BMW]]
[[Category:BMW R series]]
[[Category:1930s motorcycles]]
 
 
[[Category:1930s motorcycles]]
[[Category:1930s motorcycles]]

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