BMW R25 Specs (Top Speed | Horsepower | Weight)

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The BMW R25 motorcycle specifications include a 247 cc (15.07 cu in) engine, a 4-speed gearbox, and a listed weight of 140 kg (308.6 lb).

Key specifications

1950-1951Model years
247 ccDisplacement
140 kgWet weight
12 LFuel tank
92 mmGround clearance
Model years covered
19501951

Year-specific specification changes

No material specification changes from the 1950 baseline were found in the available data.

How the BMW R25 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.

Displacement247 cc
Low 247 ccAverage 909 ccHigh 1,649 cc

About 73% lower than the BMW database average. Around the 4th percentile across BMW models.

Wet weight140 kg
Low 130 kgAverage 226.7 kgHigh 364 kg

About 38% lighter than the BMW database average. Around the 5th percentile across BMW models.

Fuel capacity12 L
Low 9.8 LAverage 19.2 LHigh 30 L

About 38% smaller than the BMW database average. Around the 6th 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.

Displacement4th

247 cc — larger displacement than about 4% of BMW models.

Wet weight5th

140 kg — heavier than about 5% of BMW models, or lighter than about 95%.

Fuel capacity6th

12 L — larger than about 6% 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 length2,073 mm
This bike

2,073

BMW avg

2,193

5% below average.

Overall width750 mm
This bike

750

BMW avg

877

15% below average.

Overall height710 mm
This bike

710

BMW avg

1,199

41% below average.

Ground clearance92 mm
This bike

92

BMW avg

125

26% below average.

Mechanical overview

Engine layout snapshot

Single cylinder, four-stroke • 247 cc • Air cooled
Chassis snapshot

Clearance 92 mm
4-speed • Shaft drive (cardan) (final drive) • 3.25-19 front / 3.25-19 rear

Additional useful specifications

Front tire size 3.25-19
Rear tire size 3.25-19
Estimated theoretical fuel range 343 km
Bore/stroke ratio 1.00:1 (Square)

Model information

Category Allround

Engine specifications

Engine type Single cylinder, four-stroke
Displacement 247 cc (15.07 cu in)
Bore × stroke 68.0 x 68 mm (2.7 x 2.7 inches)
Compression ratio 6.5:1
Cooling system Air
Fuel system Carburettor. Bing
Fuel control Overhead Valves (OHV)
Ignition Battery
Starter Kick
Lubrication Wet sump

Transmission and drivetrain

Gearbox 4-speed
Final drive Shaft drive (cardan) (final drive)
Clutch Single plate dry-cable operated

Chassis and suspension

Frame Steel-single cradlel
Front suspension Cartridge
Rear suspension Pushrod

Brakes, wheels and tires

Front brakes Expanding brake (drum brake)
Rear brakes Expanding brake (drum brake)
Front tire 3.25-19
Rear tire 3.25-19

Dimensions and weight

Wet weight 140 kg (308.6 lb)
Overall length 2,073 mm (81.6 inches)
Overall width 750 mm (29.5 inches)
Overall height 710 mm (28.0 inches)
Ground clearance 92 mm (3.6 inches)
Carrying capacity 290

Fuel and emissions

Fuel capacity 12.00 L (3.17 US gal)
Fuel consumption 3.50 L/100 km (28.6 km/l or 67.21 mpg)
Greenhouse gases 81.2 CO 2 g/km. (CO2 – Carbon dioxide emission)

Performance

Top speed 80.0 km/h (49.7 mph)

Electrical and instruments

Battery Lubrication system

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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