BMW R71 Specs (Top Speed | Horsepower | Weight)

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The BMW R71 motorcycle specifications include a 746 cc (45.52 cu in) engine, a 4-speed gearbox, and a listed weight of 187 kg (412.3 lb).

Key specifications

1938-1941Model years
746 ccDisplacement
187 kgWet weight
14 LFuel tank
1,400 mmWheelbase
Model years covered
1938193919401941

Year-specific specification changes

No material specification changes from the 1938 baseline were found in the available data.

How the BMW R71 compares

This compares the motorcycle with all BMW models in this specifications database. The blue marker is this model and the grey line is the BMW database average.

Displacement746 cc
Low 247 ccAverage 909 ccHigh 1,649 cc

About 18% lower than the BMW database average. Around the 35th percentile across BMW models.

Wet weight187 kg
Low 130 kgAverage 226.7 kgHigh 364 kg

About 18% lighter than the BMW database average. Around the 15th percentile across BMW models.

Fuel capacity14 L
Low 9.8 LAverage 19.2 LHigh 30 L

About 27% smaller than the BMW database average. Around the 15th percentile across BMW models.

This model BMW database average

BMW database percentile rankings

Percentiles show where this motorcycle sits across the BMW specifications database. They are descriptive database rankings, not performance ratings.

Displacement35th

746 cc — larger displacement than about 35% of BMW models.

Wet weight15th

187 kg — heavier than about 15% of BMW models, or lighter than about 85%.

Fuel capacity15th

14 L — larger than about 15% of BMW fuel tanks in this database.

Dimensions compared with BMW average

Each measurement is compared with the average value across BMW models where that dimension is available.

Overall length2,130 mm
This bike

2,130

BMW avg

2,193

Close to average.

Overall width815 mm
This bike

815

BMW avg

877

7% below average.

Overall height960 mm
This bike

960

BMW avg

1,199

20% below average.

Wheelbase1,400 mm
This bike

1,400

BMW avg

1,497

6% below average.

Mechanical overview

Engine layout snapshot

Two cylinder boxer, four-stroke • 746 cc • Air cooled
Chassis snapshot

Wheelbase 1,400 mm
4-speed • Shaft drive (cardan) (final drive) • 3.5-19 front / 3.5-19 rear

Additional useful specifications

Front tire size 3.5-19
Rear tire size 3.5-19
Estimated theoretical fuel range 311 km
Bore/stroke ratio 1.00:1 (Square)

Model information

Category Custom / cruiser

Engine specifications

Engine type Two cylinder boxer, four-stroke
Displacement 746 cc (45.52 cu in)
Bore × stroke 78.0 x 78 mm (3.1 x 3.1 inches)
Compression ratio 5.5:1
Cooling system Air
Fuel system Carburettor. Graetzin G24
Fuel control Overhead Valves (OHV)
Starter Kick
Lubrication Wet sump

Transmission and drivetrain

Gearbox 4-speed
Final drive Shaft drive (cardan) (final drive)
Clutch Dry-single plate-cable operated

Chassis and suspension

Frame Tubular steal duplex cradle
Front suspension Cartridge
Rear suspension Twin shock-swingarm

Brakes, wheels and tires

Front brakes Expanding brake (drum brake). Single
Rear brakes Expanding brake (drum brake)
Front tire 3.5-19
Rear tire 3.5-19
Wheels Spoked

Dimensions and weight

Wet weight 187 kg (412.3 lb)
Overall length 2,130 mm (83.9 inches)
Overall width 815 mm (32.1 inches)
Overall height 960 mm (37.8 inches)
Wheelbase 1,400 mm (55.1 inches)
Carrying capacity 210

Fuel and emissions

Fuel capacity 14.00 L (3.70 US gal)
Fuel consumption 4.50 L/100 km (22.2 km/l or 52.27 mpg)
Greenhouse gases 104.4 CO 2 g/km. (CO2 – Carbon dioxide emission)

Performance

Top speed 125.0 km/h (77.7 mph)

Other specifications

Seat Single seat

Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from BMW models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official BMW information before relying on them. Visit the official BMW website.

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