Difference between revisions of "BMW R27"

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[[Image:R27.jpg|thumb|350px|BMW R27]]
The '''BMW R27''' was a 250cc [[single cylinder]] [[motorcycle]] made by [[BMW]] beginning in 1960.
The '''BMW R27''' was a 250cc [[single cylinder]] [[motorcycle]] made by [[BMW]] beginning in 1960.


==Description==
==Description==
Based largely on the [[BMW R26|R26]], in 1960 the '''R27''' added rubber mounts for the engine and boosted power to 18 hp (13 kW). The R27's 250 cc [[OHV]] vertical single was the only rubber-mounted thumper engine BMW ever produced, and was their last shaft drive single-cylinder motorcycle. The engine pumped out 18 hp (13 kW), the highest ever for a shaft-drive BMW single. BMW manufactured 15,364 R27 models (engine numbers 372 001 – 387 566 ) over the production years of 1960 to 1966. Some of the 1966 R27 models were sold as 1967 models because dealers in those years often would assign dates to BMW motorcycles when they sold them, and not necessarily when they were manufactured.
Based largely on the [[BMW R26|R26]], in 1960 the '''R27''' added rubber mounts for the engine and boosted power to 18 hp (13 kW). The R27's 250 cc [[OHV]] vertical single was the only rubber-mounted [[thumper]] engine BMW ever produced, and was their last shaft drive single-cylinder motorcycle. The engine pumped out 18 hp (13 kW), the highest ever for a shaft-drive BMW single. BMW manufactured 15,364 R27 models (engine numbers 372 001 – 387 566 ) over the production years of 1960 to 1966. Some of the 1966 R27 models were sold as 1967 models because dealers in those years often would assign dates to BMW motorcycles when they sold them, and not necessarily when they were manufactured.


The vast majority of R27 motorcycles exported to the United States by BMW were black with white pin striping. A few, however, were brought in by importer Butler & Smith in a color called Dover white, with black pin striping. Why "Dover white?" Butler & Smith head honcho, Michael Bondy, had a 1942 Packard automobile in an off-white color called dover white. Bondy sent a sample of this color to BMW AG in Munich and asked that it be duplicated. BMW did copy the color, and Bondy ordered fifty motorcycles in that color. Today, BMW motorcycles in original dover white are a sought-after rarity.
The vast majority of R27 motorcycles exported to the United States by BMW were black with white pin striping. A few, however, were brought in by importer Butler & Smith in a color called Dover white, with black pin striping. Why "Dover white?" Butler & Smith head honcho, Michael Bondy, had a 1942 Packard automobile in an off-white color called dover white. Bondy sent a sample of this color to BMW AG in Munich and asked that it be duplicated. BMW did copy the color, and Bondy ordered fifty motorcycles in that color. Today, BMW motorcycles in original dover white are a sought-after rarity.


BMW did things differently from other manufacturers. This is evident in the R27. Its enclosed shaft final drive is rare for a single cylinder motorcycle. But it also had a triangulated Earles front fork (named after English designer Ernest Earles); so the motorcycle had a front [[swingarm]] as well as a rear swingarm. When you squeezed the front brake lever hard not only did the front end not dive, it actually rose slightly. Thus, braking was a very steady activity, though the brakes were weak by today's standards. The engines crankshaft was laid out fore-to-aft, not side- to-side; also a rare feature. This way, the crank and the final shaft were in line, and drive forces did not have to be run through a set of 90-degree gears. Also, the kick starter swung out sideways instead of parallel to the frame, so [[kick starting]] an R27 is a rather easy and danger-free affair.
BMW did things differently from other manufacturers. This is evident in the R27. Its enclosed shaft final drive is rare for a single cylinder motorcycle. But it also had a triangulated [[Earles front fork]] (named after English designer [[Ernest Earles]]); so the motorcycle had a front [[swingarm]] as well as a rear swingarm. When you squeezed the front brake lever hard not only did the front end not dive, it actually rose slightly. Thus, braking was a very steady activity, though the brakes were weak by today's standards. The engines crankshaft was laid out fore-to-aft, not side- to-side; also a rare feature. This way, the crank and the final shaft were in line, and drive forces did not have to be run through a set of 90-degree gears. Also, the kick starter swung out sideways instead of parallel to the frame, so [[kick starting]] an R27 is a rather easy and danger-free affair.
   
   


==1967==
==1967==
[[Image:1967-BMW-R27-Black-9971-0.jpg|left|thumb|1967 BMW R27 in Black]][[Image:1967-BMW-R27-Black-9971-1.jpg|left|thumb|1967 BMW R27 in Black]][[Image:1967-BMW-R27-Black-9971-2.jpg|left|thumb|1967 BMW R27 in Black]][[Image:1967-BMW-R27-Black-9971-3.jpg|left|thumb|1967 BMW R27 in Black]][[Image:1967-BMW-R27-Black-9971-4.jpg|left|thumb|1967 BMW R27 in Black]][[Image:1967-BMW-R27-Black-9971-5.jpg|left|thumb|1967 BMW R27 in Black]]
[[Image:1967-BMW-R27-Black-9971-0.jpg|left|thumb|1967 BMW R27 in Black]]
[[Image:1967-BMW-R27-Black-9971-1.jpg|left|thumb|1967 BMW R27 in Black]]
[[Image:1967-BMW-R27-Black-9971-2.jpg|left|thumb|1967 BMW R27 in Black]]
[[Image:1967-BMW-R27-Black-9971-3.jpg|left|thumb|1967 BMW R27 in Black]]
[[Image:1967-BMW-R27-Black-9971-4.jpg|left|thumb|1967 BMW R27 in Black]]
[[Image:1967-BMW-R27-Black-9971-5.jpg|left|thumb|1967 BMW R27 in Black]]
<br style="clear: left"/>
<br style="clear: left"/>


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*Point gap (inches):        0.016 (0.4mm)<br>
*Point gap (inches):        0.016 (0.4mm)<br>
*Ignition timing - Advance: Automatic<br>
*Ignition timing - Advance: Automatic<br>
*:degrees BTDC - retarded: 7<br>
*:degrees [[BTDC]] - retarded: 7<br>
*:degrees BTDC - advanced: 40-44<br>
*:degrees BTDC - advanced: 40-44<br>
*Valve clearance (cold)<br>
*Valve clearance (cold)<br>
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[[Category:1960s motorcycles|R27]]
[[Category:1960s motorcycles|R27]]
[[Category:BMW R series]]
[[Category:BMW R series]]
{{Motorcycle
|name            = BMW R27
|photo= R27.jpg
|aka              = R 27
|manufacturer    = BMW
|parent_company  =
|production      = 1960 - 1966
|model_year      =
|predecessor      =
|successor        =
|class            = Classic
|engine          = single cylinder, four-stroke
|bore_stroke      = 68.0mm x 68.0mm
|compression      = 8.2:1
|top_speed        = 81 mph (130 km/h)
|power            = 17.57 HP (13.1 KW) @ 7400RPM
|torque          =
|ignition        = battery
|spark_plug      =
|battery          =
|transmission    = Gear box: 4-speed <br>
Final Drive: [[shaft]] drive (cardan) <br>
Clutch: single plate dry-cable operated <br>
|frame            =
|suspension      =Front: cartridge <br>
Rear: twin shock-swingarm
|brakes          =Front: expanding [[brake]] (drum brake) <br>Rear: expanding brake (drum brake)
|front_tire      = {{tire|3.27-18}}
|rear_tire    = {{tire|3.27-18}}
|rake_trail      =
|wheelbase        = 37.99 inches (965 mm)
|length          = 82.28 inches (2090 mm)
|width            = 25.98 inches (660 mm)
|height          = 38.39 inches (975 mm)
|seat_height      =
|dry_weight      =
|wet_weight      = 162.0 kg
|fuel_capacity    = 3.96 Gallon (15.00 Liters)
|oil_capacity    =
|fuel_consumption = 3.30 liters/100 km (30.3 km/l or 71.28 mpg)
|turning_radius  =
|related          =
|competition      =
}}
The '''[[BMW]] R27''' was a single cylinder, [[four-stroke]] Classic [[motorcycle]] produced by [[BMW]] between 1960 and 1966. It could reach a top speed of 81 mph (130 km/h). Claimed [[horsepower]] was 17.57 HP (13.1 KW) @ 7400 RPM. 
==Engine==
The engine was a [[air cooled]] single cylinder, four-stroke. A 68.0mm [[bore]] x 68.0mm [[stroke]] result in a [[displacement]] of just 247.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv). 
==Drive==
The bike has a 4-speed transmission. Power was moderated via the single plate dry-cable operated. 
==Chassis==
It came with a 3.27-18 front [[tire]] and a 3.27-18 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 twin shock-swingarm. The R27 was fitted with a 3.96 Gallon (15.00 Liters) fuel tank. The wheelbase was 37.99 inches (965 mm) long. 
==1960 - 1966 BMW R 27==
[[File:bmw-r27-1960-1966-0.jpg|600px|1960 - 1966 BMW R 27]]
The 1960 BMW R 27 has, at its heart, an air-cooled, four-stroke, 247cc, single cylinder engine paired to a four-speed manual transmission that can produce a claimed 18 horsepower at 7400 rpm. It also comes with a telescopic front fork coupled to a rear suspension composed of a long swing arm with suspension units and oil pressure dampers, a drum braking system, a single, sprung seat, laced wheels, an exhaust with a large muffler at its end, a large headlamp and full fenders.
==In Media==
* [https://motopixel.org/pixel/dos-chicas-locas#bmw-r27 Dos Chicas Locas]
* [https://motopixel.org/pixel/suspendido-en-sinverguenza#bmw-r27 Suspendido en sinvergüenza]
* [https://motopixel.org/pixel/codigo-fuego#bmw-r27 Código fuego]
* [https://motopixel.org/pixel/matchless#bmw-r27 Matchless]
* [https://motopixel.org/pixel/castello-cavalcanti#bmw-r27 Castello Cavalcanti]
* [https://motopixel.org/pixel/ich-heirate-eine-familie#bmw-r27 Ich heirate eine Familie]
* [https://motopixel.org/pixel/pasolini-prossimo-nostro#bmw-r27 Pasolini prossimo nostro]
* [https://motopixel.org/pixel/eine-ganz-heie-nummer#bmw-r27 Eine ganz heiße Nummer]
* [https://motopixel.org/pixel/la-corrupcion-de-chris-miller#bmw-r27 La corrupción de Chris Miller]
* [https://motopixel.org/pixel/mission-impossible#bmw-r27 Mission: Impossible]
* [https://motopixel.org/pixel/auf-achse#bmw-r27 Auf Achse]
* [https://motopixel.org/pixel/tatort-jagdrevier#bmw-r27 Tatort - Jagdrevier]
[[Category:Classic motorcycles]]
[[Category:BMW motorcycles]]
[[Category:1960s motorcycles]]

Latest revision as of 20:11, 23 November 2019

BMW R27

The BMW R27 was a 250cc single cylinder motorcycle made by BMW beginning in 1960.

Description[edit | edit source]

Based largely on the R26, in 1960 the R27 added rubber mounts for the engine and boosted power to 18 hp (13 kW). The R27's 250 cc OHV vertical single was the only rubber-mounted thumper engine BMW ever produced, and was their last shaft drive single-cylinder motorcycle. The engine pumped out 18 hp (13 kW), the highest ever for a shaft-drive BMW single. BMW manufactured 15,364 R27 models (engine numbers 372 001 – 387 566 ) over the production years of 1960 to 1966. Some of the 1966 R27 models were sold as 1967 models because dealers in those years often would assign dates to BMW motorcycles when they sold them, and not necessarily when they were manufactured.

The vast majority of R27 motorcycles exported to the United States by BMW were black with white pin striping. A few, however, were brought in by importer Butler & Smith in a color called Dover white, with black pin striping. Why "Dover white?" Butler & Smith head honcho, Michael Bondy, had a 1942 Packard automobile in an off-white color called dover white. Bondy sent a sample of this color to BMW AG in Munich and asked that it be duplicated. BMW did copy the color, and Bondy ordered fifty motorcycles in that color. Today, BMW motorcycles in original dover white are a sought-after rarity.

BMW did things differently from other manufacturers. This is evident in the R27. Its enclosed shaft final drive is rare for a single cylinder motorcycle. But it also had a triangulated Earles front fork (named after English designer Ernest Earles); so the motorcycle had a front swingarm as well as a rear swingarm. When you squeezed the front brake lever hard not only did the front end not dive, it actually rose slightly. Thus, braking was a very steady activity, though the brakes were weak by today's standards. The engines crankshaft was laid out fore-to-aft, not side- to-side; also a rare feature. This way, the crank and the final shaft were in line, and drive forces did not have to be run through a set of 90-degree gears. Also, the kick starter swung out sideways instead of parallel to the frame, so kick starting an R27 is a rather easy and danger-free affair.


1967[edit | edit source]

1967 BMW R27 in Black
1967 BMW R27 in Black
1967 BMW R27 in Black
1967 BMW R27 in Black
1967 BMW R27 in Black
1967 BMW R27 in Black


Specifications[edit | edit source]

  • Bore (mm): 68
  • Stroke: (mm): 68
  • Number of cylinders: 1
  • Plug gap (inches): 0.024 (0.6mm)
  • Point gap (inches): 0.016 (0.4mm)
  • Ignition timing - Advance: Automatic
    degrees BTDC - retarded: 7
    degrees BTDC - advanced: 40-44
  • Valve clearance (cold)
    inlet (inches): 0.006 (0.15mm)
    exhaust (inches): 0.008 (0.20mm)
  • Electrical system voltage: 6
  • Battery terminal grounded: Negative
  • Tire size: 3.25 x 18
  • Tire pressure
    front (PSI): 21-22
    rear (PSI): 22-23 (28-29 when carrying passengers)
  • Number of gears: 4
  • Approx. weight (Lbs.): 356

Maintenance[edit | edit source]

  • Recommended spark plugs were:
    Bosch type W240T1
    BERU type 240/14
    Champion type L-85
  • Timing marks are located on the flywheel. These marks align with a notch in a timing hole which is located in the left side of the flywheel housing. Marks on the flywheel are:
"OT" for top dead center
"S" for static timing
"F" for advanced timing

Advanced timing is checked with the motor running at 3000RPM. Adjustment is accomplished by moving the entire breaker plate assembly after loosening two screws and sliding the assembly along elongated holes.

R27.jpg
BMW R27
Manufacturer
BMW
Also called R 27
Production 1960 - 1966
Class Classic
Engine
single cylinder, four-stroke
Bore / Stroke 68.0mm x 68.0mm
Compression ratio 8.2:1
Top Speed 81 mph (130 km/h)
Horsepower 17.57 HP (13.1 KW) @ 7400RPM
Ignition battery
Transmission Gear box: 4-speed

Final Drive: shaft drive (cardan)

Clutch: single plate dry-cable operated
Suspension Front: cartridge
Rear: twin shock-swingarm
Brakes Front: expanding brake (drum brake)
Rear: expanding brake (drum brake)
Front Tire 3.27-18
Rear Tire 3.27-18
Wheelbase 37.99 inches (965 mm)
Length 82.28 inches (2090 mm)
Width 25.98 inches (660 mm)
Height 38.39 inches (975 mm)
Weight 162.0 kg (wet)
Fuel Capacity 3.96 Gallon (15.00 Liters)
Fuel Consumption 3.30 liters/100 km (30.3 km/l or 71.28 mpg)
Manuals Service Manual


The BMW R27 was a single cylinder, four-stroke Classic motorcycle produced by BMW between 1960 and 1966. It could reach a top speed of 81 mph (130 km/h). Claimed horsepower was 17.57 HP (13.1 KW) @ 7400 RPM.

Engine[edit | edit source]

The engine was a air cooled single cylinder, four-stroke. A 68.0mm bore x 68.0mm stroke result in a displacement of just 247.0 cubic centimeters. Fuel was supplied via a overhead valves (ohv).

Drive[edit | edit source]

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

Chassis[edit | edit source]

It came with a 3.27-18 front tire and a 3.27-18 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 twin shock-swingarm. The R27 was fitted with a 3.96 Gallon (15.00 Liters) fuel tank. The wheelbase was 37.99 inches (965 mm) long.

1960 - 1966 BMW R 27[edit | edit source]

1960 - 1966 BMW R 27

The 1960 BMW R 27 has, at its heart, an air-cooled, four-stroke, 247cc, single cylinder engine paired to a four-speed manual transmission that can produce a claimed 18 horsepower at 7400 rpm. It also comes with a telescopic front fork coupled to a rear suspension composed of a long swing arm with suspension units and oil pressure dampers, a drum braking system, a single, sprung seat, laced wheels, an exhaust with a large muffler at its end, a large headlamp and full fenders.


In Media[edit | edit source]